Former Arizona Congresswoman Gabrielle Giffords marked the third anniversary of being shot in the head at a political rally by skydiving Wednesday. Others gathered in Tucson for bell-ringing and flag-raising ceremonies to remember the six killed and 13 injured on January 8th 2011. Giffords made the tandem jump strapped to a professional skydiver. She waved and blew kisses to a crowd at a skydiving site between Phoenix and Tucson after successfully landing without injury. In Tucson, about 100 residents attended a ceremony outside the University of Arizona Medical Center, where the injured were treated. A bell was rung once for each victim. Other ceremonies and moments of silence took place across the city.