I recently got more Hot Wheels sets and proceded to further upgrade my Exo Suit's namely the Skyfire prototype with an improved backpack and weapons system better cooling system and leg thrusters for better control this has made it where only individuals of exceptional ability can handle this machine as yet testing of current UNSC personnel has yielded no results we may have to extend the testing to the small group of civilian contractors we were transporting when things took a turn and we got trapped in this unknown shield world.