Lt. Cmdr. Robert Franks, an optometrist from Vacaville, Calif., checks a patient's vision during a Continuing Promise 2011 medic

110706-F-NJ219-218
PUERTO SAN JOSE, Guatemala (July 6, 2011) Lt. Cmdr. Robert Franks, an optometrist from Vacaville, Calif., checks a patient's vision during a Continuing Promise 2011 medical community service project at the Santa Isabel medical site. Continuing Promise is a five-month humanitarian assistance mission to the Caribbean, Central and South America. (U.S. Air Force photo by Staff Sgt. Courtney Richardson/Released)

110706-F-NJ219-218
 PUERTO SAN JOSE, Guatemala (July 6, 2011) Lt. Cmdr. Robert Franks, an optometrist from Vacaville, Calif., checks a patient's vision during a Continuing Promise 2011 medical community service project at the Santa Isabel medical site. Continuing Promise is a five-month humanitarian assistance mission to the Caribbean, Central and South America. (U.S. Air Force photo by Staff Sgt. Courtney Richardson/Released)