Let's Roll
Let's roll is a phrase in English that has been used as a term to advance and begin an activity, attack, mission or project. After the attacks of September 11, 2001, the phrase, especially in the United States, has come to symbolize heroism, self-sacrifice and initiative in a difficult situation. This use of the phrase was inspired by the last words of Todd Beamer (passenger of Flight 93 of United Airlines, the only one of the four planes that will not reach its terrorist target, Capitol of the United States): "Are you guys ready? Okay, let's roll! " ("Okay, let's roll!") The phrase has been widely used as a war cry.
wiki