Due to technical problems with the game the rules have been changed to timer starts when the flight lounge goes into lock down resulting in you being separated from Hammond and Kendra. The main reason for this is because of the bug within the game (for console users i believe) that when you unlock impossible mode and exit the game. The game will re-lock the mode so you cannot play it. However their is a way of playing it beat the game on any difficulty then play impossible and save the game in the flight lounge when Hammond and Kendra stop talking and the game prompts you with a tutorial hologram using the save station behind of Hammond. If there is any problems or questions with or about this change then please ask me or tell me in this forum.