Captain formally retired from the U.S. military on Saturday . Vice President Obama presided over formal retirement ceremonies . Captain 's wife , Gabrielle Giffords , shot last January , takes part in the ceremony . The ex - astronaut says Giffords told him not to accept failure .
Captain formally retired from the U.S. Navy on Saturday . Vice President Biden presides over formal retirement ceremony . Kelly 's wife , Gabrielle Giffords , shot last January , takes part in the event . The ex-astronaut says Giffords reminds him not to accept failure .