critical condition. and federal and state investigators report new clues what led to yeerday's attempt on her life, an attack that killed six other people, including a federal judge and nine-year-old girl. we begin with the the moment the bullets started to fly and the emergency crews were releasing the 911 calls from the first chaotic moments. >> what is your-- >> our address 7114 north >> gabby giffords was hit and the sheriff's office reports this is the man who shot her, a 22-year-old loner, as his friends describe him, a community college drop-out, an army reject, who according to military officials failed a drug test. he recently posted a series of