Wednesday, August 01, 2007 070731-N-4238B-007 ACAJUTLA, El Salvador (July 31, 2007) - Lt. Megan Zeller, an intensive care unit nurse, checks the vital signs of patient, while he recovers after surgery aboard the hospital ship USNS Comfort (T-AH 20). Comfort is on a four-month humanitarian deployment to Latin America and the Caribbean providing medical care for patients in a dozen countries. U.S. Navy photo by Mass Communication Specialist 3rd Class Kelly E. Barnes (RELEASED)