Best Free Disk Wipe Utility?

[tweak13]

I'm looking for a utility that I can create a boot disk to wipe my hard drive to DoD standards (7 passes 0's n 1's), the catch is being I would like it to be free. Anyone have suggestions?

 

[moviegeek65]

KillDisk

 

[tweak13]

KillDisk

::BUZZER::

Nope KillDisk free version = only 1 pass