Former U.S. Congresswoman Gabrielle Giffords, wife of Mark Kelly, NASA astronaut and commander of mission STS-134, pose for a picture at the Alpha Magnetic Spectrometer (AMS) Payload Operations and Command Center (POCC) at the European Organization for Nuclear Research (CERN) in Meyrin near Geneva, Switzerland, Wednesday, July 25, 2012. Giffords toured the European particle physics laboratory Wednesday, cheerfully facing reporters while surrounded by family and aides but saying little during her first trip abroad since being shot in the head in January of last year. Two days after riding a cable car up into the French Alps, Giffords accompanied her husband, retired astronaut Mark Kelly, on a visit to the European Center for Nuclear Research, which assembled a US$2 billion cosmic ray detector that Kelly and his team of astronauts carried to the International Space Station. (AP Photo/Keystone/Martial Trezzini)

In this courtroom sketch, Jared Loughner is lead into the courtroom by a U.S. Marshal prior to sentencing in U.S. District Court Thursday, Nov. 8, 2012, in Tucson, Ariz. U.S. District Judge Larry Burns sentenced Loughner, 24, to life in prison, for the January 2011 attack that left six people dead and Giffords and others wounded. Loughner pleaded guilty to federal charges under an agreement that guarantees he will spend the rest of his life in prison without the possibility of parole. (AP Photo/Bill Robles)

In this courtroom sketch, U.S. District Court Judge Larry A. Burns listens in court as shooter Jared Lee Loughner, who is accused of shooting the former congresswoman, and killing six people, and injuring 13, enters his plea agreement sending Loughner to prison for the rest of his life, Tuesday, Aug. 7, 2012, in Tucson, Ariz. (AP Photo/Bill Robles)