Lt. Megan Zeller checks the vital signs of a young boy. U.S. Navy Lt. Megan Zeller, an intensive care unit nurse, checks the vital signs of a young boy recovering from surgery aboard the hospital ship USNS Comfort (T-AH 20) in Acajutla, El Salvador, on July 31, 2007. The Comfort is on a four-month humanitarian deployment to Latin American and Caribbean countries providing medical care for patients. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 067958-N-DKY13-648.jpg Photo Gallery