heater. the other thing we're learning is the door. why was the door left open. there should have been a mechanism that shut it. that does not appear to have happened here. that's something they are looking into as well. >> dozens of people injured in this and i peers the death toll will rise today. thank you. developing, an out pouring of lovl and support for beloved actor and comedian bob saget who died yesterday. he's best known for playing danny tanner. he was just 65 years old. found dead in his orlando hotel room on sunday hours after performing a stand up comedy show. brian stelter joins me now. the tributes really pouring in. >> absolutely. we're hearing from his co-star, colleagues. even comedians who never met him