Invest in hacking. In the second-to-last mission, there's a hidden terminal just before a rocket of notability. You need to crouch into a small vent, tossing aside what I believe is a large object with your super-strength, and hack a terminal.
Inside just so happens to contain a terminal from Hangar 18. What, you thought it was Hangar 18 in the first game? Hell no, it's that Hangar 18!