 Complete the following phrase:  PVS-17s were regarded as one of the successful systems that reached U.S. troops just before the Iraq Wars Operation Iraqi Freedom OIF began. According to testimony by Lieutet General Edward Hanlon Jr. before the House Armed Services Committee, Subcommittee on Tactical Air and Land Force on April 1, 2004, the Marine Corps fielded many new items of equipment and weapon systems just prior to or during the deployment of 1st Marine Expeditionary Force for 