Former Army Capt. Will Swenson will receive the Medal of Honor on Oct. 15, more than four years after he and other U.S. forces tried desperately to find and save three Marines and a Navy corpsman who were trapped under heavy fire in the infamous Battle of Ganjgal in Afghanistan. Those troops didn’t make it out of the Sept. 8, 2009, ambush alive, but Swenson has not forgotten them. He invited the families of Marine 1st Lt. Michael Johnson, Gunnery Sgt. Edwin Johnson, Staff Sgt. Aaron Kenefick and Navy Hospitalman 3rd Class James Layton to his White House ceremony, said…