Petty Officer 2nd Class Shareeda Timmons troubleshoots the Inter-Americas Naval Telecommunications Network aboard the aircraft carrier USS Harry S. Truman as Brazilian naval Officers Lt. Cezar Santos and Lt. Luis Alves look on. The network is used to communicate with Brazilian coalition ships. Truman is underway participating in a Joint Task Force Exercise designed to test and evaluate the U.S. Navy's reaction to multiple wartime scenarios. The exercise is the final certification for a strike group preparing to deploy.