170516-N-DY073-0171 ANNAPOLIS, Md. (May 16, 2017) U.S. Naval Academy plebes form a human tunnel for their classmates to crawl through during the class of 2020 Sea Trials. Sea Trials is a capstone event for the freshman midshipmen, modeled after the Marine Corps' crucible and the Navy's Battle Stations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brianna Jones/Released)