scott haidler, al jazeera, da nang. >> you can always keep up-to-date with all the news at our website at www.aljazeera.com. america's tonight, on the tough choices, and the consequences, 40 years after the fall of saigon. >>> thank for joining us, tonight, a special look at a moment in time, seered into the memory he have many americans 40 years later is slipping into the history books to many it was nen as black april, as they drove into the south and forcedded you will fall the saigon she and as so many fled for their lives. >>> and one of the last to get out, an american , who tells michael, of the days he can never forget. >>> i climbed to the rooftop and, they beat them out of the way so i could get in the chopper. as the chopper began leaving it arced up, and i could see, on the edge of the city, 140,000 north vietnamese troops moving in with the lights on. >>> the final moment before the fall of saigon, 0ed forever into the memory of frank snap, one of the last americans to leave vietnam ♪ ♪ bong crosby's white christmas playered po the radio and, it was secret code for the ope

scott haidler, al jazeera, da nang. >> you can always keep up-to-date with all the news at our website at www.aljazeera.com.