Quote from : X-Men: Days of Future Past Movie

Bolivar Trask: How old is your son now, Major?
Maj. Bill Stryker: Jason? He's coming up on ten now, if you can believe it.
Bolivar Trask: Eight years from fighting age. And how many of our sons and brothers did we just ship home in body bags? Maybe fifty, fifty five thousand? And how many more on the other side? Never before, in all of human history, has there been a cause which could unite us as a species... until now.
Maj. Bill Stryker: You hardly hate mutants, Doctor, don't you?
Bolivar Trask: On the contrary, I rather admire them, the things they can do. I see mutants as our salvation.
Maj. Bill Stryker: A common enemy?
Bolivar Trask: A common struggle against the ultimate enemy... extinction.