. >>> as a child, jason desilva loved making home movies. he was 18 when he made his first film.d with primary progressive multiple sclerosis. >> all of a sudden, i was walking slow up and down the subway steps, kind of walking like i was drunk during the day. >> ms is a disease where the body's immune system attacks the central nerve system, damaging or destroying nerve fibers. the independent filmmaker travelled the world, making nine films, and then desilva turned the camera on himself, documenting the ravages of his disease, and the struggle people with disabilities have living in new york city. >> we're not superhuman. you know, people with disabilities shouldn't be asked to do the impossible. >> in the seven years it took to make the movie, "when i walk," which aired on pbs, desilva went from walking, to using a walker, to wheelchair, and now a motorized scooter. his vision has started to deteriorate. his hands curl, making it impossible to hold a camera. he met his wife, alice cook, at an ms support group meeting. together, they finished the film, and another legacy. son,

as a child jason desilva loved making home movies.e was 18 when he made his first film and 25 when he was diagnosed with multiple sclerosis. >> walking slow up and down the steps and kind of walking like i was drunk during the day. >> ms is a disease where the bodies immune system attacks the central nervous system damaging or destroying nerve fibers. the independent filmmaker traveled the world making nine films and then desilva turned the camera on himself. >> interesting. >> documenting the ravages of his disease and the struggle people with disabilities have living in new york city. >> we're not subhuman, you know? people with disabilities shouldn't be asked to do the impossible. >> in the seven years it took to make the movie "when i walk" which aired on pbs, desilva went from walking to using a walker to a wheelchair and now a motorized scooter. his vision has started to deteriora deteriorate. his hands curl making it impossible to hold a camera. passionate about making the city easier to negotiate for people with disabilities h

. >> in the seven years it took to make the movie, "when i walk" desilva went from walking to using aker to a wheelchair and now a scooter. his vision has started to deteriorate. his hands curl, making it impossible to hold a camera. passionate about making the city easier to negotiate for people with disabilities he and his wife created a map of all of the places in the city that are wheelchair accessible. >> some of the things i'm getting is making a difference. but that's what keeps me going. that's how i can stay positive. >> human factor is brought to you by cancer treatment centers of america. care that never quits. ñzóó >>> we're back with this. with the start of the school year transitioning kids to get up earlier is a challenge. it's a challenge for us. one group of doctors is saying let them sleep. it's 5:22 a.m., and for many high school kids, it's time to get up for school. the bus comes at 6:20, the first bell rings at 7:25. a new report says that's too early. it says for middle school and high school students school shouldn't start before 8:30. >> melatonin a hormone tha