chris was a basketball star at uc-berkeley.h played hockey at the university of vermont. >> ultimately ended up at netscape, the internet company, and that's where i met chris. >> reporter: they were on the cutting edge at netscape when the company, when the whole internet, was just getting off the ground. >> i was in the pr department, so i'd call media people and talk about the internet. and they had no clue what the internet is, what e-mail is. >> reporter: in 1999, the young couple cashed out their stock options, got rich and left to work for themselves. >> we decided to have kids. and i really wanted to be a soccer mom and pta and all that, you know, and just kind of take it down a notch. >> reporter: a few years later, the twins were born. for the first year and a half, they seemed healthy. the first problems were subtle. >> we started noticing they started having problems with balance and coordination. and not seeing things kind of in front of them, like, you know, toys. >> reporter: and then it got worse. much worse. so