This one could be funny if it weren't so tragic - yet another case of careless engineering? DARPA has announced that the cause of the March 24 crash of Falcon 1 rocket was a busted aluminum nut that cost only $5.
Falcon 1 was a rocket built by private company called Space Exploration (SpaceX). The rocket blew up shortly after launch due to a fuel leak caused by a corroded nut.
SpaceX plans to launch another Falcon 1 rocket in November.