. >> dr chen admits the challenges are overwhelming. >> i extent 25 years in rutland as a physician, politician, as a school board member. we raised three kids there. it was all around us. i consider myself lucky that it didn't happen to one of my kids. >> it happened to kimberley, introduced to heroin by her mother. >> i knew from growing up that drugs were the way to escape. that's what my mum did, used drugs to get out of reality. >> how did you make the other choice to clean up, when so men people are falling through? >> i wanted to live. and i was at a point where i wasn't going to live much longer. >> coming up, so what about the next generation? "america tonight" gets exclusive access to a hospital where babies born to adict mothers go through intense, painful withdrawals. >> al jazeera america presents >> somebody's telling lies... >> it looks nothing like him... >> pan am flight 103 explodes december 21st, 1988 was the right man convicted? >> so many people, at such a high level, had the stake in al-megrahi's guilt >> the most definitive look at this shocking crime >> the ma