These are some military patches.

To Serve Man

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_2.html

The 509th Bomb Wing flew B-2 stealth bomber test flights, and used to be based at Roswell, N.M., home of the 'Roswell Incident.'

 

The Ghost Squadron - Classis Caece - Noli Rogare - De Multa Nocte

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_3.html

This patch was worn by an obscure unit called the "Ghost Squadron" operating out of a secret Air Force base near Groom Lake to provide helicopter support.

 

A lifetime of Silence - Behind the Green Door

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_4.html

The origins of this patch remain unknown. The red star is in Southwest, which is many secret units' home, while military intelligence typically uses green vaults.

 

Tssam

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_5.html

The Tri-Service Standoff Attack Missile was a classified cruise missile symbolized by the Tasmanian Devil. The acronym Tssam recalled the cartoon character.

 

Panther Den - Information Warfare

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_6.html

Panther Den is a Special Access Program based at Hanscom Air Force Base, Mass., responsible for defending and attacking computer networks.

 

National Reconnaissance Office - We Own the Night

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_7.html

This patch commemorates the August 17, 2000, launch of a "classified National Reconnaissance Office payload" atop a Titan IV rocket.

 

Minataur

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_8.html

Minotaur is a still-classified program undertaken by Lockheed Martin's Advanced Development Programs division, the Skunk Works.

 

Nitwits Rubes Oafs - Top Secret - Setec Astronomy

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_9.html

The first letter of each word in the phrase "Nitwits Rubes and Oafs" spells out the agency responsible for this patch: the NRO, the National Reconnaissance Office

 

Black Cat

http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_index.html

The 413th Test Squadron, nicknamed the "Bombcats" and also known as Sundowner and Zipper, organized flight tests of Electronic Warfare systems around the world