SEND IN THE MARINES
'(<a href="http://www.j-archive.com/media/2005-09-28_J_29.jpg" target="_blank">Jimmy of the Clue Crew visits a training course at Parris Island, SC.</a>)  10 weeks into training, recruits undergo this endurance test, hauling 54 lbs. of gear; it's named for a metal melting vessel'
the Crucible