Or formerly quietly, as the case may be

Wallington, a division chief in the Army's office of enterprise information systems, says the military is quietly working to integrate Macintosh computers into its systems to make them harder to hack.

(Forbes, noted by Schneier on Security)

Of course the real story here is not so much that Macs are harder to hack (they may be for now, but with enough high-value targets floating around hackers will try harder, too) but that, as is pointed out in comments on Schneier's blog, a uniform environment is easier to attack than a diverse one. I call it the potato famine effect.

(And yeah, this is posted in a new way which will probably need some adjusting.

(Which in fact it did. Good idea, but needs work.)