. >>> and olympic gold medalist cullen jones will join us live. he is trying to save lives one child at a time by teaching children, especially minority children, to swim. cullen will join us to talk about his mission. >>> but first, new information on the boston bombing case. sources tell nbc news that the younger brother dzhokhar tsarnaev scribbled a note confessing where he was hiding before authorities closed in on him. on a wall he reportedly wrote that his actions were in retaliation for u.s. wars in iraq and afghanistan. he also wrote the boston marathon victims were, quote, collateral damage. and that he does not mourn his older brother who was killed in a shoot-out with police because he is considered a martyr. ny sis does your dog food have? 30? 20? new purina one beyond has 9. the simplified purina one beyond. learn more about these wholesome ingredients at purinaone.com [ female announcer ] some people like to pretend a flood could never happen to them. and that their homeowners insurance protects them. [ thunder crashes ] it doesn't. s

cullen jones nearly became a statistic at age 5. >> i was under water for about 30 seconds. and it only takes a child about 20 seconds to drown. >> reporter: jones not only survived, he learned how to swim. boy can he swim. he became an olympic gold medalist in 2008, and is now trying to turn around those drowning statistics by inspiring and teaching kids. his advice, the cure-all. learn to swim. >> i urge families and parents to take one summer, put the hair in braids, go natural for one summer, that's it, learn how to swim. because it's just like riding a bike, you never forget how to do it. >> reporter: he hasn't forgotten. he's training for the next olympics, hoping some of these kids will follow his lead. david kerley, abc news, bethesda, maryland. >>> and still ahead here, talk about hope for everyone. two men in their 80s are praising each other to the top of mount everest. see it next. i stepped on the machine, and it showed me the pressure points on my feet and exactly where i needed more support. i had tired, achy feet. until i got my number. my dr. scholl's custom

. >>> plus, olympic gold medalist cullen jones talks about his mission to try to save lives one child at a time by teaching children to swim. cullen will join the news nation live. [ children laughing ] energy efficient appliances. you can get a tax write off for those. a programmable thermostat, very smart, saves money. ♪ cash money sorry. i see you have allstate claim free rewards, for every year you don't have a claim, you'll get money off your home insurance policy. put it towards... [ glass shatters ] [ girl ] dad! dad! [ girl screams ] noise canceling headphones? [ nicole ] that's a great idea. [ male announcer ] home insurance that saves you money for not having a claim? that's allstate home insurance with claim free rewards. talk to an allstate agent... [ doorbell rings ] and let the good life in. talk to an allstate agent... [ doorbell rings ] always go the extra mile. to treat my low testosterone, i did my research. my doctor and i went with axiron, the only underarm low t treatment. axiron can restore t levels to normal in about 2 weeks in most men. axiron is not for use in

cullen jones nearly became a statistic at age 5. >> i was under water 30 second. me a gold medalist in 2008, and he's now trying to change the drowning statistics by inspiring and teaching kids. his advice, the cure-all, learn to swim. >> i urge families and parents, take one summer. put the hair in braids, go natural for one summer, that's it. learn how to swim. it's just like riding a bike. you never forget how to do it. >> reporter: he's not forgotten. he's training for the next olympics, hoping some of these kids will follow his lead, david kerley, abc news, bethesda, maryland. >> the statistics are really sobering. drowning is the leading cause for unintentional death for children between the ages of 1 and 4. >> lightening things up a bit, you know what they're all missing? you at the pool. >> david hasselhoff has nothing on me. >> you on "baywatch." >> i suspect that's david hasselhoff's body there. >> probably. >> where's pam anderson? come on. can we get diana rocking pam anderson's body? >> let's not. >> can we get that completely out of context next comme