If there is a Reroll token in the Current Altitude space (as there is in the first round - 6000 feet), remove it and add it to your supply at the top left of the Control Panel. At any time during a round, any player may spend a Reroll token. This allows BOTH PLAYERS to reroll one or more of the dice behind their screen ONCE. (For example, the Pilot can spend the token to reroll 2 of the 3 dice remaining behind their screen, and the Co-Pilot can decide to reroll all 4 of their dice.)