Brendan M. Marrocco sits with his two transplanted arms resting in his lap during a news conference Tuesday, Jan. 29. 2013 at Johns Hopkins hospital in Baltimore. Marrocco lost all four limbs in a 2009 roadside bomb attack in Iraq.
Doctors received two arms from a deceased donor for the complex transplant surgery. According to the hospital, Marrocco's transplants involved the connection of bones, blood vessels, muscles, tendons, nerves and skin on both arms. His doctors said it was the most extensive and complicated limb transplant procedure so far performed in the United States.