Factual error: When the presidential Boeing 747 is taking off with vice president, it is said that the plane will get to 30000ft in 45 seconds, which is the sort of climb rate only attainable by fighters, not jumbo jets, even at presidential specifications.
Factual error: Shortly after President Sawyer and John have to climb up the elevator shaft in the White House, there is a shot of several motorcycles riding in the front of a motorcade. The motorcycles are BMW R1200RTs. The Capitol Police, DC Metro Police and the Secret Service use Harley Davidson motorcycles.
Factual error: The submarine that is due to launch nuclear missiles is called the Albuquerque. That submarine is an SSN (attack sub) not an SSBN (missile sub).
Plot hole: After blowing up the gate, the President turns on the TV news in the car...for no reason, other than for them to conveniently get the information that Channing Tatum's daughter is about to be executed, distracting him.
Answer: Knowing is not believing. They might know, but they wouldn't necessarily trust the media. After all it could have been a grand conspiracy to cover up the actual truth from the people.
Alan Keddie
I highly doubt world war 3 would start before these countries did their homework though. It wouldn't take long for them to suss out it was actually terrorists who detonated the bombs and not America.
The_Iceman