this is "nightline." >> tonight, drilling for disaster. police, fire rescue, and medical first responders rehearsing for mass casualty attacks. a crisis already hitting some close to home. >> we all shed a lot of tears later that day. >> suppressing active shooters. evacuating wounded. airlifting victims for emergency treatment. how texas' best are preparing for the worst. plus round two. michael b. jordan and the cast of "creed" back in the ring for another fight to the finish. >> you don't think i can beat him. >> squaring off with the son of his father's killer. >> it's like a violent dance and he's my dance partner. >> why they say the slugfest is

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...uniting the world. ♪♪ good evening. thank you for joining us. a mass shooting, a bombing, any kind of mass casualty event is chaotic by nature. anticipate. with thousands of variables. but the one thing first

responders crespond ers can count on is each other knowing how to act and communicate during a disaster, the difference between lives lost and lives saved. tonight abc's matt gutman joins rescuers in texas for a full-on dress rehearsal for their worst nightmare. what you're about to see is a drill. >> we are going to need two units -- >> reporter: for these first responders in san antonio, texas, every second counts. >> hurt, where's hurt -- >> reporter: every move on the scene, every decision at these trauma centers, is the difference between life and death. >> we're going to need someone to continue holding pressure on the neck. >> reporter: the trauma may look disturbingly real, but this is a drill. what is happening today is one of the largest mass casualty drills in the nation. it's a nightmare scenario. three active shooters opening fire and detonating a bomb during a high school graduation

at the freeman coliseum. the details may be different but the aftermath is created to look eerily similar to the recent mass shootings. las vegas. pittsburgh. thousand oaks. and just one year ago, here in texas, the church shooting in sutherland springs. >> it's not a question if something's going to happen, it's a question of when. how we're prepared to respond to that is critical. >> reporter: the drill starts before sunrise. >> i am working on a deep laceration to the arm -- >> reporter: professional makeup artists with volunteers who are playing victims. >> it's important to make it realistic. when actual medical personnel run into something that is gruesome, they'll be better prepared to deal with it. >> reporter: each of these actors has been assigned a specific trauma. do you know when you're supposed to do as a person with an arterial gunshot wound?

>> it says i'm supposed to scream in pain. >> reporter: first responders begin to take their places. >> they should guide you in. >> reporter: lieutenant john franzen preps his team. >> we're going to run it like a real event. >> reporter: as the mock shootings begin to unfold -- >> they're dispatching right now. ladder 9, engine 9, engine 30 -- >> reporter: franzen gives us an inside look at the very first moments of the fire department's response. >> what we don't want to do is send all of our assets to one location, then it be a complex coordinated attack. >> reporter: again, this is just a drill. but every detail matters. this is the best practice they will get for real-life trauma. >> you can get a sense of the chaos of a moment like this. helicopters up in the air. ambulances on the ground. medical supplies everywhere. >> reporter: the mass hysteria is a planned response. s.w.a.t., fire and rescue,

paramedics who are s.w.a.t. trained as well. they're trying as quickly as possible to get people who need immediate treatment out first, and those who can survive a bit longer, leave them for the end because they don't need the help as immediately as others. figuring out who goes where and how they're going to get there is one of the biggest hurdles for first responders. >> dsw, she's got to go next. >> reporter: gsw is gunshot wound. this young lady has one, as does this one. these patients need to go next, they need immediate treatment. >> right now we're going to join the casualties in one of these ambulances going in. and we're going to guide out to the heli pad. >> reporter: the most severe victims are airlifted to local hospitals. this wounded officer being driven by ambulance to a nearby helipad. >> he's got a significant wound to the head with a gunshot, one to the hands. you can tell how rocky it is in an ambulance like this, moving

around. these paramedics have to work under these conditions. stuff falling down everywhere. it's not easy. meanwhile, patients from the coliseum begin flooding the ers of some of san antonio's level 1 trauma centers. brook army medical center and university hospital. >> going into the bay. >> go ahead and get her oxygen. >> it's chaotic but controlled chaos. >> reporter: dr. ramon sisterer in is the trauma surgeon on call today. he says the purpose isn't just to run through the medical treatment. >> what do we do after this? >> we get x-rays. >> reporter: also to streamline more basic things like communication between different wings of the hospital so a patient can get critical care faster. >> we called o.r.? >> we called o.r. >> what did they say? you physically have to call the

o.r. >> communication is a big piece of what we're going to do. >> trying to figure out how they'd manage it at our level, at their level. optimizing that is one of the key goals for today. to be road to receive a mass casualty incident, at 2:30 on a saturday morning, 3:00 a.m. on a wednesday -- >> reporter: as doctors a know all too well, it could be on a quiet sunday at 11:20 a.m. that's when a gunman armed with an ar-15 walked into the first baptist church in sutherland springs, texas, and opened fire. killing 26 and injuring dozens. dr. ronald stewart was one of the trauma surgeons working at university hospital that day. >> we treated nine patients. >> did all of them survive? >> one did not. one did not. small child. i think the average person would

probably not understand, really, how difficult it is to take care of patients with these types of high-velocity wounds. what you are about to see might be disturbing. >> basically this is really very similar types of wounds that we saw at the sutherland springs. >> reporter: dr. eastridge uses snapshots from a real war zone as an example. >> this here is actually what will be a typical wound from a high-velocity round. it basically creates a wave, a blast wave. like if you throw a pebble in a pond. >> reporter: this is why, in addition to practicing how they respond to a mass shooting, both dr. eastridge and dr. stewart believe their medical community must also get involved in curbing firearm violence. >> we really have put our heart and soul into reducing these injuries from occurring in the first place. >> reporter: but unsurprisingly, this view is controversial. when the american college of physicians recently published this paper on the topic of gun

violence, the nra responded by telling doctors to say in their lane. then medical professionals across the country fought back. using the viral hash tag #thisisourlane, sharing gruesome images of their firsthand experiences with gun violence. dr. eastridge says his own experience with gun violence, from the sutherland spring shooting, took an emotional toll on his hospital. >> everybody really collapsed later that afternoon. >> do you remember that moment for you? >> i made it to my truck. and then i probably didn't leave for about an hour. i mean, that illustrates how we compartmentalize it. we all shed a lot of tears later

that day. and days subsequent. >> reporter: for everyone involved in today's drill, this is personal. because whether they've already faced tragedy before or fear that they may have to, they know that what they're learning today will save lives. >> you have all of these resources available, it's going to help us when the real deal happens. >> reporter: for "nightline," i'm matt gutman in san antonio, texas. >> our thanks to matt. and next, a grudge match more than three decades in the making. michael b. jordan on becoming a new type of underdog for a new generation.

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the heart of the "rocky" films has always been in the triumph of the underdog. the "creed" franchise is sticking to the script. with a relatively low budget and low expectations, the first installment shocked critics with a box office knockout. now with heavy hitters in his corner, michael b. jordan's character is facing down his toughest opponent yet. >> it's time, kid. >> reporter: with all the subtlety of a haymaker -- >> don't do this. >> reporter: and the emotional impact of a hook to the kidneys -- >> we got this. you hear me? >> reporter: michael b. jordan is back in his star-making role as adonis creed. this time this pugilistic bromance is personal. revenge served cold. as in knockout cold. >> this guy, he's dangerous. >> you don't think i can beat him? >> reporter: "creed ii" reunites

sylvester stallone's rocky balboa with the son of apollo creed. >> you got everything to lose this guy's got nothing to lose. >> i ain't got a choice. >> that's the same thing your father said, and he died right here in my hands. >> reporter: the second installment of the reinvented "rocky" films. >> seeing opportunity for a new underdog, a new hero for a different generation. >> reporter: jessa thomas ret n returretur returns, the woman in his life. >> this movie is about family and it happens to take place in the world of boxing. >> reporter: "creed ii" centers on one of the most tragic events in "rocky" history. >> we've got to get this no matter what. >> reporter: apollo creed dying in the ring. over 30 years later, "creed ii" offers a rematch by proxy, two sons picking up where their fathers left off. >> victor drago, son of ivan

drago, who infamously killed apollo creed -- >> adonis is living in his father's shadow. he's trying to heal during the course of the two films. >> reporter: dolph lundgren returns. you have a favorite line from "rocky iv"? >> i had three lines, i think. i must break you. if he dies, he dies. i felt really bad about apollo, by the way. when i say that, a 27-year-old swedish kid, i was a big fan of the rocky franchise. i read the script, what, i have to kill this guy? >> he's one of the all-time favorite characters. >> i always feel a little bit bad. >> this time he's not a vicious fighter but a father. >> what do you want the audience, especially guys, to get from that dynamic, father and son? >> i think the big thing about this film, it's about redemption, forgiveness, you know? about relationships, about father/son, the fact that you don't have to go on hating each other forever. >> reporter: making a comeback of her own in "creed ii,"

bridget nielsen. >> he's a professional fighter, no the a killer. >> reporter: who starred alongside lundgren in "rocky iv." romanian boxer florian plays their son. >> i was the new guy on set. i would never ask to go training, to do rehearsals and stuff. but he initiated it. he wanted to create this father/son bond which helped me a lot. i think you can see that on screen. >> reporter: 6'4", almost 200 pounds, he's a formidable opponent. >> once you start, it's -- like in my head it was real. i am drago, he's creed. i want to literally destroy this guy, you know? so you kind of forget at some points that it's not a real boxing match. >> florian's a real fighter. us gaining that trust with one another, learning the choreography, it's like a violent dance. >> big-ass dance partner. >> it is. we step on each other's toes

from time to time. >> reporter: all those months in the gym paid off. >> do your pecs get bigger as the franchise goes on? >> pecs and back too, i'm a back guy. >> i found the pecs impressive. i'm a sucker. they move independent. >> he moves his? >> yeah, i love that. like tap dancing. >> i'm the entertainer on set. >> reporter: outside the ring jordan's character has also matured. he gets engaged and becomes a father. >> we wanted to give adonis a family, which is the thing he's been longing for for a long time. obstacles and struggles come along with that. >> adonis and bianca are a power couple insofar as they're a couple that really want to see each other flourish and succeed. and i think we are that way as friends to each other. and so that's, you know, really great. >> well, i wouldn't be any good to anybody if i don't handle this the right way. but i need you.

i'll beat him. >> you better. >> as you're playing a father now, but you're someone who has a good relationship with his own dad. that helped. >> there's certain moments from my own life with my own father that i would substitute, you know. oh, this is something adonis would do. >> reporter: but "creed" was an unexpected hit, made for $35 million, grossing over $170 million worldwide. and earned an oscar nomination for stallone. >> maybe he did exactly what he wanted. >> i think he'd rather be here, talking with you. >> reporter: "creed ii" is on track to do just as well in the box office, grossing over nksgiving weekend. the director took over the franchise from the original director. >> there was a lot of talk about this italian story being told

with a black in a leading role, a black director. there's less talk about the race element this time. >> there's progression. there's progression in the movement. people are listening, people are watching, accepting us. our movie, our storytelling is universal and can speak to many. >> reporter: he joins a list of black directors and actors making movies with mass appeal like "black panther" which became a global phenomenon and propelled jordan to superstardom? >> on all levels it took things to a different level. the fact that we have -- impact on our community and generations to come we can't calculate right now. >> reporter: what you can bet on more from jordan, tom man, and the fighters from "creed." >> there is a "creed iii" in the works? >> i hope so. iii, iv, v. as long as we keep things fresh, as long as the fans are happy, as long as i can get tessa, afford her, convince her to come

back. no, but seriously, though. it's definitely something we have opportunity to build on, make something new and fresh. why not? touchdown confirmed. >> next, what on mars are these people so happy about? the historic achievement that has nasa over the moon. ready to get your feast on? you better be 'cause it's red lobster's new create your own ultimate feast event! pick 4 of 10 favorites to create the ultimate feast you've been dreaming of. will you choose creamy lobster mac & cheese, tender, wild-caught snow crab... crispy jumbo coconut shrimp, hey, we never said choosing was easy... just delicious. so hurry in to create your own ultimate feast before it's gone. and be the party hero. get ten percent off when you order red lobster to go. but only for a limited time.

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finally tonight, there may not be life on mars, but now there is a camera.ayton sandell >> touchdown confirmed! >> reporter: tonight, a touchdown worthy of an interplanetary super bowl. moments later this image from nasa's insight mission proving it stuck the first mars landing in six years. insight survived the seven minutes of terror, space to ground 12,000 miles per hour to full stop, and every step flawless. >> you made it through that seven minutes of terror. >> yeah, i still have a few fingernails left, they're mostly gone. >> reporter: now insight begins a two-year mission, for the

first time peering inside the red planet. they'll do that using these sensors the team hopes will unlock ancient mysteries about how our solar system was formed. clayton sandell, jet propulsion laboratory, in california. >> oprah winfrey said, the biggest adventure you can take is live the life of your dreams. that's "nightline," and catch full episodes on hulu. thanks for the company, america. good night.

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