Jon Tumilson, a Navy SEAL, was one of 30 Americans killed in Afghanistan on Aug. 6 when a rocket-propelled grenade took out a U.S. Chinook helicopter. He was mourned at a service in Rockford, Iowa, attended by 1,500 family members,  friends–and Hawkeye, Tumilson’s dog.Full Story Story By Yahoo! News-The Lookout/ Pic By Getty Images