The Argentine coast guard opened fire on a Chinese vessel on Saturday.
'Hammer Time' in the Coast Guard
During the 2014 Coast Guard Sector Jacksonville, Fla., Cutter Roundup, cutter crews compete against each other in the Heat and Beat Challenge Tuesday, April 29, 2014. Heat and beat is a technique used by Coast Guard aids to navigation crews when attaching new chain to a buoy and involves heating a shackle pin until it is glowing and then beating it into place using sledgehammers. (U.S. Coast Guard video by Petty Officer 1st Class Lauren Jorgensen)