General Roundtree is wearing enlisted brass on his lapels and the US is on the wrong side.
"General" Roundtree is wearing the silver bar of a 1st Lt. on his uniform epaulets...not the stars of a General.
Captain Goddard is wearing an officers jacket with enlisted trousers and has no rank or branch insignia on his uniform.
If oxygen supply is low, they will begin feel tired or lethargic. They would no be coughing or hacking.
General Roundtree is wearing an Good Conduct Medal (an enlisted award) and Silver Star but the order they are displayed are wrong too.
Marines wouldn't be transferring to Colorado Springs, where there's an Air Force Academy, NORAD at Cheyenne Mountain (Air Force) and Fort Carson (Army).
Active military would not have full grown beards.