. >>> qantas airways says it's trying to determine what caused a water leak on one of its flights. >>ater rained through the ceiling of the double-decker a-380 jet tuesday night after takeoff from l.a.x. it was headed to australia. but as the water flowed, the pilot turned the plane around, returning back to l.a. >> yeah. you couldn't keep going 15 hours like that. >> the airline said there were no safety concerns because of the leak. but it's getting to the bottom of how it happened. the 400 or so passengers were put in hotels and rebooked for another flight to australia yesterday morning. >>> emergency crews are working this morning to clear train tracks outside pittsburgh after a derailment and fire. investigators believe one train rear-ended another, derailing three cars within seconds. two fuel tanks caught fire, sending huge plumes of black smoke and flames into the air, dangerously close to homes and businesses. >> we heard a big crash. it was like the loudest crash ever. we all looked over from the pool, over towards the railroad. and the biggest ball of flame i've seen in my

the qantas airways jet was forced to land at l.a.x. an hour after takeoff. one shot this video that shows water leaking on to the double-decker jet and run do you think the passengers' seats. >>> a burned out food truck and people pulled from the flames. tonight we're getting our first look at the aftermath of the huge explosion. last night we showed you this dramatic security camera video of that food truck exploding in philadelphia. now cell phone video shows the smoldering truck and passerbys pulling two people from the truck. more than a dozen people were injured including the mother and daughter who work the truck. they're among the five people still in critical condition. witnesses say it was pure chaos. >> the next thing i know, a big boom. smoke, screams. something i'll never forget. >> a girl was walk by and her whole back got sprayed with debris. and she was screaming all the way up the street, i'm on fire, i want my mom, i want my mom. >> reporter: a significant leak was found in one of the truck's propane tanks. >>> new video, the latest addition

shares of qantas airways fell.ajority-owned by the australian government. 49% cap oneep foreign ownership in place. rio tinto said production rose 11% in the second quarter. the expanded operations in western australia. output matched estimates. oil prices have fallen only seven percent this year -- 27% this year. those are your headlines. theme running through markets and this morning, it is tech. the fed concerned about tech valuations. they should a report. sent facebook and twitter lower. a partner atw is passion capital. decidesshocking the fed to send us a memo to tell us that tech is overstretched? >> i think it is interesting. they had to try to assert what their involvement would be and how engaged they could be with the market. it was a bit of a stretch for them to say is valuations were overstretched. >> do you disagree? >> i disagree. i think it was a sweeping generalization and it was ill guided. a lot of media coverage, some of the examples people would throw out to validate janet yellen's comments. >

carriers such as british airways and qantas avoided the route.apore airlines flight which flew over ukraine on the day of the mh-17 crash. >> still in sort of a strange emotions about it actually, like it could have been our flight. and could have been any flight. >> reporter: within hours, flights started to avoid ukraine. but the big question is why were they flying over ukraine to begin with? all the oairlines that the bbc contacted said they were only using internationally approved air routes, pointing a finger at organizations like euro control and the united nations international civil aviation organization. but they both say this is a sovereign issue and it is up to the national authorities to declare any unsafe areas of air space. >> surprised they were allowed to fly over there, just because it is a war zone, it is known they're having trouble there anyway. >> the faith is shaken, but it is not entirely destroyed, i would say. >> we take a lot of things for granted. and we trust the regulators in whatever things that they decide for us.

carriers like british airways and air france flew around the conflict zone altogether. reuters reports so did qantasrlin, asianna airlines, korean airlines and taiwan's china airlines. carriers like malaysian airlines flew directly over the war zone. >> you can't simply take every air space that might have a problem and say we're not going to fly there because, as i say, the global scope of that would be enormous. >> late this week, the dangers of the air space now abundantly clear. those aviation authorities took action. the aviation arms of the u.n. and europe recommending that airlines avoid the air space. and the u.s. and ukraine prohibiting flights there. but for flight 17, it's too late. renee marsh, cnn, washington. >> malaysia airlines have just announced that they are retiring the mh-17 flight number. the flights will continue, but the flight number is going away from the 25th of july and it's out of respect for the crew and passengers. the impact of the crash is being felt around the world with people in many countries grieving. as you can see, most of the victims were from netherlands. th

"new york times" report shows carriers like british airways and air france flew around the conflict zone all together. reuters reports, so did qantas, air berlin, asiana airlines, korean airline and china airlines. carriers like malaysia airlines flew directly over the war zone. >> you can't simply take every air space that might have a problem and say, we're not going to fly there, because as i say, the global scope of that would be enormous. >> reporter: late this week the dangers of the air space now abundantly clear. those aviation authorities took action. the aviation arms of the u.n. and europe recommending that airlines avoid the air space. and the u.s. and ukraine prohibiting flights there. but for flight 17, it's too late. renee marsh, cnn, washington. >>> do stay with me. our special coverage of malaysia flight 17 continues after a quick break. stay with us on cnn. [ man ] look how beautiful it is. ♪ honey, we need to talk. we do? i took the trash out. i know. and thank you so much for that. i think we should get a medicare supplement insurance plan. right now? [ male announcer ] whether you're new to medicare or not, you

carriers like british airways and air france flew around the conflict zone altogether. so did qantaschina airlines. carriers likeless airlines flew directly over the war zone. >> you can't simply take every air space that might have a problem and say we're not going to fly there because as i say, the global scope of that would be enormous. >> reporter: late this week the dangers of the air space now abundantly clear. the aviation authorities took action. the aviation arms of the u.n. and europe recommending that airlines avoid the air space and the u.s. and ukraine prohibiting flights there. but for flight 17, it's too late. rene marsh for erin burnett "outfront." >> i want to bring in miles o'brien. you know, this is one of the things that regulators can tell you do do something and you can obey it to the letter. and some airlines chose to use their judgment. so they could have avoided it is the bottom line. >> you know, there are laws. there's the letter of the law and then there is plain common sense. any pilot would tell you they always want to have a fallback option, a way out,

qantas, singapore airlines, adriana -- asiana. korean air lines, which of course had been victim already. it does not make sense that everybody is now pointing the finger to malaysian airways. other air planes have been there as well. lufthansa was close by, so everybody to his risk, and of course, it is cheaper to fly the shortest connection, but sometimes it is not safer. >> so many playing a role in this? >> well, money always lays a role in aviation. >> thanks so very much for joining us. >> you are welcome. >> and thank you for being with us as well. we'll be right back after a short break. >> we will find out about a big surprise from one of germany's world cup winning stars. he's not going to be around for the next one. do stay tuned. >> don't go away. >> welcome back. israel has upped its ground offensive in gaza with artillery, tanks, and gunboats now being used, and it has warned that the operation could significantly widen further. >> the move followed 10 days of rocket fire between gaza and israel and various failed attempts by egypt to broker a cease-fire. >> one israeli soldier is confirmed dead in this latest operation that began late on thursday. palestinia