according to an iranian envoy to the u.n., sarah shourd is scheduled to be released tomorrow. >> iran says they are releasing shourd as an act of clemency. it's believed she's suffering from a serious medical condition. the two other americans, josh fattal and shane bauer, remain in prison. september 11th, 2001, will forever be a day in history where you will never forget where you were. >> it also motivated many people to join up and fight in the afghan and iraq wars. soldiers today but nine years ago just kids. martha raddatz reports from afghanistan. >> reporter: it seemed impossible flying over afghanistan to think that it has been nine years since 9/11. but for some of the soldiers here, 9/11 is nearly half a lifetime ago. private parker watson still has a baby face at 20. but he is a battle-hardened combat medic. when this war began, he was just a little boy. >> were you frightened?