abc's byron pitts steps into the thick of things to find out. >> reporter: 2:00 p.m., in the middle ofthe u.s. border patrol spots a group of men crossing the border into the u.s. from mexico. and the race is all, some are detained, some as young as 18. >> reporter: and this happens a lot? >> every day. this is normal, why we're down here. >> reporter: and that is why we're here, as well. the $18.5 billion spent each year on border security led to the decrease in the flow of border crossings and the increase in drug seizures. >> you can see how they modified it. they actually put wood, cut the bottle, and underneath is where the drugs are. >> reporter: but that success has forced the drug cartels and the human strugglers to push their operations to one stretch of the border where the u.s. has the fewest resources and the widest open spaces. right here, a native american reservation the size of connecticut. how long do you think it will be there? i have come to spend 48 hours with the border agents. >> just rocks and dirt. no shade. >> reporter: this is lieutenant mike ford, who with th

here's abc's byron pitt. >> this is the most violent tornado i've ever seen by far. >> reporter: seemswas just 11 days ago this 210-mile-per-hour tornado plowed through the town of moore. >> oh my gosh, i don't know if people lived in that one. >> reporter: 40 minutes, 20 people dead, 10 of them children. hundreds injured, hopes gone. jason shot this video moments before he and his family took shelter below ground. only to re-emerge to this. >> the lord giveth and the lord taketh away. >> reporter: his optimism spoke to the oklahoma spirit. but this video released to abc news showed what that spirit had to endure. this was the moment the tornado struck briarwood elementary school. one teacher at the presence of mind to record it. >> it's almost over. it's almost over. >> reporter: the screams of terrified children soon followed by the letter assuring voices of teachers. when it was over, the reunions started. >> it's okay, honey, it's okay, i know. >> reporter: the cobb family rushed to collect their daughters from briarwood. this image seen around the world. >> i tried to move it off

byron pitts on what that shoe shiner has been quietly doing for decades. >> he's our miracle from god lynn moore is talking about the man who saved her family from a medical nightmare. her 13-year-old boy severely injured his leg. lynn just lost her job and the family's health insurance. the hospital bill was $30,000. they had no way of paying it until a stranger stepped? >> what an awesome man to do this for our family. we just want to thank you. >> reporter: that stranger, 71-year-old albert lexie, not a big time banker or corporate philanthropist, but a local shoe shine man. >> it takes time to shine a pair of shoes. >> development amountly disabled, he started shining shoes at 15 and has given every dime of his tip money to children's hospital of pittsburgh. as of tonight albert has donated $269,000. we he got the idea from watching telethons. how do you explain it to do such wonderful work and be such a major force in this institution? >> sorry. there's no power on earth like love. none. none as equal. albert is that exemplifies that in its finest, purest way. >> reporter: albert

our sister network, espn broke this story and byron pitts tells us just how big this could be. >> reporter: it's happening again, some of the biggest names in baseball, involved in scandal. including alex rodriguez of the new york yankees and ryan braun of the milwaukee brewers. >> you look up to them. they're your idol. then you find out they're cheating. >> reporter: espn reporting exclusively that major league baseball is preparing to suspend all involved for up to a hundred games for allegedly using performance enhancing drugs and lying about it. this is the biggest drug case in baseball maybe in the history of baseball given the number of players involved. >> reporter: today fellow players voiced frustration. >> we've put in place plans to clean up the game for the right reasons. >> reporter: don hooten became an advocate for cleaning up baseball after his son abused baseball and died. he reached out to rodriguez after he admitted to using steroids in 2009. >> we've been in front of children across the u.s., talking to performance-enhancing drugs, and i'm terrified if it turns out he

>> abc's byron pitts tonight. byron, thank you. >>> and there is still much more ahead here on "world news" this sunday night. is it a miracle shot for so many of us looking to turn back the clock for our aches and pains? the doctors who believe we're carrying the cure in our own bodies. and this man is back in the gym because of it. >>> and later tonight here, some super shots of the super moon. from the town of normal, illinois, to moscow, idaho. i asked you for tweets last night, and what we got had us over the moon today. [old english accent] i doth declare that thou have brought overmany discounts to thine customers! [old english accent] safe driver, multi-car, paid in full -- a most fulsome bounty indeed, lord jamie. thou cometh and we thy saveth! what are you doing? we doth offer so many discounts, we have some to spare. oh, you have any of those homeowners discounts? here we go. thank you. he took my shield, my lady. these are troubling times in the kingdom. more discounts than we knoweth what to do with.

byron pitts is in johannesburg. good morning. >> good morning. moving is right. we're outside nelson mandela's home. where the steady stream of the concerned and curious continues today. as for president obama, he and the first family visited robben island today, home of the infamous prison where mandela spent much of his 27 years behind bars. yesterday he met privately with members of mr. mandela's family and offered words of comfort. later, he held a meeting in soweto. and every public event in south africa, the president made the point that as a young man else inspired by nelson mandela to live his dreams. the president will overnight in cape town and tomorrow continues his tour of africa making a stop in the capital of tanzania. >> thanks, byron. >>> now to our exclusive interview with julian assange. he's standing by from his safe room at the equadorian embassy in london. first we have more on assange, and the assistance wiki leaks is providing to edward snowden. >> reporter: good morning. he fled from hong kong to russia. assange is said to be threatening.