Lex was the first active duty MWD, military working dog, to be granted an early retirement in order to be adopted. This is not usually done, but Lex had shrapnel lodged close to his spine and veterinarians feared removing it. Lex was a German Shepherd Marine who was wounded in an attack during the Iraq War when his handler Marine Corporal Dustin J. Lee was killed. Lex was awarded a Purple Heart. He died of cancer on March 25, 2012 at the age of 13.
Many people think MWD stands for military war dog, but it stands for military working dog.