he took a lot of target practice. he never shot at moving targets. and jerry parnham's moving the president toward that open door. >> december 8th, 1980, john hinckley's fragile world begins to crack when he hears shocking news from new york city. >> the news ripped through the air in shock waves. john lennon shot and killed in the apartment building where he lives. the suspect is identified as mark david chapman. >> hinckley idolized lennon. that new year's eve, he locks himself in his room at his parents' house, drinks peach brandy, plays his guitar, and wallows in his own misery. ♪ sometime during the night, hinckley writes in his diary, john lennon is dead. forget it. it's just going to be insanity. i still think about jodie all