By Lester Holt, NBC News anchor
Forty years ago today a trio of American astronauts was launched on a mission to the moon. Though it was hardly "old hat," the truth is after two previous moon landings the flight of Apollo 13 didn't generate quite the buzz of the others. After all, the space race was over. America had beaten the Soviets to the moon – then disaster struck. Apollo 13 suffered a crippling in-flight explosion. Not only would it not reach the moon, there was a strong chance the crew would not make it back to earth. Tonight we'll mark the anniversary of the Apollo 13 mission with a look at NASA facing the end of an era in manned space flight.
We'll also be live in Warsaw tonight -- a city awash in grief and tears -- after the body of Poland's president was returned following that fiery plane crash in Russia. In addition there are new clues as to why the plane, carrying the president and a delegation of government officials, may have gone down.
Ron Allen remains on that tragic adoption story out of Tennessee, about an American mother who sent her adoptive son back to Russia. Tonight there is word of another American family who faced a similar crossroads.
I hope you can join us for NBC Nightly News.