If I remember correctly, the White House literally has turrets on the roof (snipers I'm 100% confident in), the bunker is made to withstand an unbelievable air payload (so some Antifaggot with his mom's $15 wireless drill won't be getting through anytime soon), and a number of tunnels that lead to other buildings utilized by the Executive Branch. There's a fat 0% chance they'd be even remotely close to doing anything.