U.S. Navy Capt. Melanie Merrick, commanding officer of Medical Treatment Facility USNS Mercy, greets media members from Papua New Guinea for a tour of the ship during Pacific Partnership 2015 in Papua New Guinea, June 27, 2015. U.S. Navy Capt. Melanie Merrick, commanding officer of Medical Treatment Facility USNS Mercy, greets media members from Papua New Guinea for a tour of the ship during Pacific Partnership 2015 in Papua New Guinea, June 27, 2015. SHARE: Download: Full Size (1.8 MB) Tags: photo essays Credit: VIRIN: 913377-F-PBD21-257.jpg Photo Gallery