I hadn't seen the film in 20, 30 years so I was looking forward to viewing it again. It did not disappoint but you have to look at it through the time frame it was produced.
Anyone with knowledge of the Manhattan Project would see the many discrepancies and historical/political inaccuracies in the film but considering it was made only a year or so after the end of World War Two and with the security concerns of the times, it holds up very well. The many scientist who are opposed to making the bomb and/or using it after completion is correct shown but thank heaven the bomb was dropped.
My late Father always said the bombings of Hiroshima and Nagasaki saved his life. After three years of combat in Europe, he was scheduled to transfer to the Pacific for the planned invasion of Japan. Had he died storming Japanese shores, I would not be here to write this review.
Seeing The Beginning or the End today make one realize it is a period piece with acting and romantic sub-plots set in the time frame of World War Two film making when the motion picture industry wholeheartedly supported the United States of America even with the subplot of some scientists disagreeing with the making and use of the bomb.
Nowadays, Hollywood is very anti-American as it yearly churns out films that knock the American Way of Life and our military men and women. When a film like 'Lone Survivor' comes along that supports our troops, many in the media cast it as right-wing pro-war propaganda.
Funny, films like Robert Redford's Lions for Lambs and The Company You Keep and Matt Damon's Green Zone megabomb at the box office while Lone Survivor is a surefire money making hit.
It makes one wonder... 
when Hollywood will discovery the fool's errand they journey down?
Silly rabbit, Trix are for kids... 
as wasting millions and millions on liberal agenda BS flicks is for Hollywood--