Musk's SpaceX to help return astronauts despite federal investigations of billionaire's businesses

Elon Musk's SpaceX is answering the call to help NASA rescue stranded astronauts from the International Space Station despite the federal government's investigations of the company's billionaire CEO and his various ventures.

NASA astronauts Butch Wilmore and Suni Williams have been stuck at the International Space Station since they were shuttled there by the Boeing Starliner spacecraft in June for a mission that was initially expected to last one week. 

Starliner experienced helium...