June 2, 2009 11:02 pm Conan O'Brien – Running Into History Conan O’Brien debuted at host of the Tonight Show on Monday night. Andrew Siff takes a look at the opening number – step by step. US & World Videos 2:39 Nighttime forecast for Sept. 7 1:12 Forecast for Sept. 7 1:17 Morning forecast for Sept. 7 0:47 Overnight forecast for Sept. 7 2:27 Nighttime forecast for Sept. 6