>> it's a through and through injury it does make a difference. have you a significant amount of energy from that bullet. if that energy passes through the brain and comes out the front, some of the injury is going to dissipate in air as opposed to within the skull cavity. if all of that energy from that bullet is being sort of distributed in the brain, that's a much worse injury, so the fact that it goes through and through in this case is a better sign for her. >> dr. sanjay gupta. the mass shooting in tucson is not the first incident that's given the state of arizona negative headlines. some recent controversies next. e our claimservice. gecko:speciallthe auto repair xpress. repairs are fast and they're guaranteed for as long as you is thisyyourcphone?ey, th! gecko: yeah, 'course. sswhere do you po you...carry... for as long as you is thisyyourcphone?ey, th! waitress: here you go. boss: thanks gecko: no, no i got it, sir.