Retired Astronaut Mark Kelly, husband of former Arizona Rep. Gabrielle Giffords, speaks during a hearing of the Senate Judiciary Committee on Capitol Hill January 30, 2013 in Washington, DC. The committee held the hearing with retired Astronaut Mark Kelly, husband of former Rep. Gabrielle Giffords, Wayne LaPierre, Chief Executive Officer of the National Rifle Association, and others to testify about solutions to gun violence in the United States. AFP PHOTO/Brendan SMIALOWSKI
Credit: BRENDAN SMIALOWSKI
Astronaut Mark Kelly attends the TIME 100 Gala, TIME's 100 most influential people in the world, at Jazz at Lincoln Center on April 29, 2014 in New York City.
Credit: Ben Gabbe
In this handout provided by National Aeronautics and Space Administration (NASA), Astronaut Mark Kelly, STS-134 commander, gets to work soon after Endeavour reaches Earth orbit as he sits at the commander's station on the shuttle's forward flight deck as he and five other veteran crew members head to the International Space Station May 16, 2011 in space. After 20 years, 25 missions and more than 115 million miles in space, NASA space shuttle Endeavour is on its final flight to the International Space Station before being retired and donated to the California Science Center in Los Angeles. Capt. Mark E. Kelly, U.S. Rep. Gabrielle Giffords' (D-AZ) husband, will lead mission STS-134 as it delivers the Express Logistics Carrier-3 (ELC-3) and the Alpha Magnetic Spectrometer (AMS-2) to the International Space Station.
Space shuttle Endeavour crew Commander Mark Kelly stands on the tarmac after he arrived at Kennedy Space Center on May 12, 2011 in Cape Canaveral, Florida. Commander Kelly's wife congresswoman Gabrielle Giffords, who was shot in the head at a meet-and-greet in her hometown of Tucson, Arizona, plans on attending the launch. Space shuttle Endeavour is scheduled to launch on its final flight to the space station on May 16th.
Credit: Joe Raedle
Captain Mark Kelly and Former Congresswoman Gabrielle Giffords attend Bard College's 153rd Commencement at the Seth Goldfine Memorial Rugby Field at Bard College on May 25, 2013 in Annandale-on-Hudson, New York.
Credit: Steve Sands
Mark Kelly leans his head on the shoulder of his wife and former Congresswoman Gabby Giffords as they attend a news conference asking Congress and the Senate to provide stricter gun control in the United States on March 6, 2013 in Tucson, Arizona. Giffords and Kelly were joined by survivors of the Tucson shooting as they spoke outside the Safeway grocery store where the shooting happened two years ago where six people were killed.
Credit: Joshua Lott
President Barack Obama (L) hugs NASA astronaut Mark Kelly, husband of U.S. Rep. Gabrielle Giffords (D-AZ), as he arrives to attend the event 'Together We Thrive: Tucson and America' honoring the January 8 shooting victims at McKale Memorial Center on the University of Arizona campus on January 12, 2011 in Tucson, Arizona. The memorial service is in honor of victims of the mass shooting at a Safeway grocery store that killed six and injured at least 13 others, including U.S. Rep. Gabrielle Giffords (D-AZ), who remains in critical condition after being shot in the head. Among those killed were U.S. District Judge John Roll, 63; Giffords' director of community outreach, Gabe Zimmerman, 30; and 9-year-old Christina Taylor Green.