and a celebration in his hometown of danville, california. >> captain chesley sullenberger is a true ( applause ) >> couric: but, like many of the passengers, the crew members are also having difficulty processing what happened, including captain sullenberger. >> sullenberger: one of the hardest things for me to do in this whole experience was to forgive myself for not having done something else, something better, something more complete. i don't know. >> couric: but it had such a good ending. >> sullenberger: yes, it did. >> couric: and it could have had such a terrible ending. >> sullenberger: i know. >> couric: but you play this over in your head. >> sullenberger: the... the first few nights were the worst, when the "what ifs" started. the second guessings would come. made sleep hard. >> couric: like what? >> sullenberger: just replaying it-- you know, flashbacks. did we... did... were we aware of everything we could have been aware of? did we make the best choices? you know, all those kinds of thoughts. >> couric: and when you think that way, do you regret anything that you did?