U.S. Navy Senior Chief Edward Byers Jr. charged in to a room, shot a Taliban fighter, then tackled and killed a second. Hearing someone calling out in English from across the room, he dove on top of an American hostage to shield him from gunfire while simultaneously pinning another enemy combatant to the wall by the throat until a fellow SEAL could shoot the Taliban fighter.
You never know how powerful a simple "thank you" may be. Video from moments.org.
The picture wasn't a perfect copy. They had gray hair and wrinkled skin now. But it didn't matter. For the first time in five decades, these Marines were together again. Link
Six young men had volunteered to serve at a stranger’s funeral because “it was the right thing to do.” Link