OMAHA, Neb. (AP) – U.S. and state flags in Omaha have been flying at half-staff for a Navy SEAL who grew up in the city and was killed during a combat patrol in Afghanistan. Twenty-six-year-old Petty Officer 1st Class Caleb Nelson died on Oct.1. The Department of Defense says his vehicle as hit by an explosive device in Zabul province. His funeral was held Thursday morning at Christ Community Church in Omaha. Nelson had been assigned to the Naval Special Warfare Group based in Norfolk, Va., since his graduation from SEAL training in 2006. Nelson is survived by his wife and two sons in Virginia, and his parents, who live in Omaha.