The craziest NASA mission ever proposed

I recently received a press release about an upcoming Science Channel special titled Man vs. the Universe. One episode will focus on the threat of asteroids impacting Earth and the various scenarios proposed to defend ourselves. The episode ends, the release says, with a segment about “the craziest NASA mission ever proposed.” The aim is to capture an asteroid in deep space with a giant bag and transport it into orbit around the moon for astronauts to study.