Combustible Dust/Howard Hughes/Joel Osteen - S40.E37

"Combustible Dust" examines how dust explosions cause property damage and death in American factories. "Howard Hughes" rebroadcasts a looks at how the Howard Hughes Medical Institute became one of the riches charities in the United States. "Joel Osteen" rebroadcasts a profile of the famous preacher. "Andy Rooney" talks about watches.