If Alpha 1 was 90, i hardly doubt that he'd be in the military any more. Unless he was cryogenically frozen...
GTA Command: Welcome back, Alpha 1!
Alpha 1: It's good to be back command.
GTA Command: Now, if you will, step onto that small square. A little to the left. Back a little. Good! Now stop right there.
Alpha 1: OK...
*Command guy presses a button*
*tank drops around the perimeter of the square, and Alpha 1 is frozen in side*
Command: Jeez, about time we got rid of that guy...
*command guy turns around*
Command: So, who's up for the strip club? My treat!
And by that point, Command guy would probably be shot. But for the purposes of this story, we'll say he survived until global warming unfroze Alpha 1 when he was delivered to Earth. THE END!