Fragments: Abort Martian Landing

"Mayday!    Mayday!   We're in trouble up here!"   came a desparete voice from space. One million two hundred thousand  miles from Earth the Martian Three rocket to Mars began to break up and fall apart.      No one knows why one of the finest rockets ever built began to shake and fall apart,     only that a Martian landing is out of the question.           Suddenly,   the only thought is to devise a plan to get the three brave men safely back to Earth!