action, taking that gunman down. we re going to talk live to one of those quick-thinking men, coming up. imagine all the people imagine. john lennon would have turned 70 today. and as millions around the world looks at his life and legacy, we preview a documentary that introduces people to a lennon nobody has ever heard before. you just heard correct. a new era officially begins. dan harris has been named anchor of good morning america weekend with us. we re all very excited. thank you. i m very excited. i am excited to do this. we ve discussed this at length. the one complication with this job is my wife s name is bianca. i m one syllable away from destruction at any moment. thank you for welcoming me in. and speaking of spouses, you are just back from your honeymoon. it was unbelievable. we went to a safari. i make fun of you for loving cats. those felines are impressive. she makes fun of me for loving cats. but she sent me video of cheetahs last night. we h