if zombies attacked

I got Left 4 Dead this past week end and it made me think. If there was a zombie outbreak of any kind how would we fare? In the game basically the military has been completely routed and i wonder if the military would be able to stand against a horde of zombies. Obviously it wouldn't make for a good horror game if the military kicked the zombies ass but how would they do in real life. Unless there are some people in high command that are either paranoid, crazy, or just overly prepared it is doubtful that there is a contingency plan to deal with an outbreak of zombies, but the game does take place two weeks after first infection so i guess the military would have some time to think of something. Well these questions point to only one thing, WE NEED TO PREPARE FOR A ZOMBIE OUTBREAK!!! (or do we.....)