Heading For Cover

Rebus #68 is a little tricky. Can you solve it?

If your new to Rebuses, you can read how to solve a Rebus here (link opens in a new window).
Do you need a little help? Click to reveal a clue to the above Rebus.
A clue to help decipher the hidden meaning – Where is the word “Head” and how many “Cover”‘s are there?