Training exercises are, well, for training, but that doesn’t mean they can’t feature a real explosion or two. Or in the case of the Rim of the Pacific exercise this week, just absolutely destroying a decommissioned frigate with all sorts of heavy firepower. There is a strategic reason for the giant operation, but clearly the U.S. Navy is enjoying the chance to obliterate a ship. The massive Rim of the Pacific, or RIMPAC, training operation has 26 nations participating, fielding more than 25,000 personnel across dozens of ships, several submarines and some aircraft. The July 12 sinking exercise (or as…