A common blood pressure drug could help people who have witnessed traumatic events, such as the London bombings, to block out their distressing memories. [...]

The drug has been shown to interfere with the way the brain stores memories. [...]

However there are concerns that a drug which can alter memories could be misused, perhaps by the military who may want soldiers to become desensitised to violence.

http://www.timboucher.com/journal/2005...08/02/block-out-those-nasty-memories/

Plus

http://www.toptechnews.com/news/Resear...ace/story.xhtml?story_id=12100CABZSC8

At the Florida Institute for Human and Machine Cognition in Pensacola, researchers are developing a system that will use the tongue as the interface for Navy SEAL divers, Army Rangers, and other front-line soldiers. Given the very science-fiction-esque name of “Brain Port,” the technology enables sonar echoes to be detected via the underused sensory organ, leaving the user’s hands and eyes free to respond to immediate dangers.

“Most of the human-computer interaction so far has been on using the eyes, ears, and hands,” said Dr. Geri Gay, professor of Communications and Information Sciences at Cornell University and an expert on interface design.

“Everything nowadays is so ubiquitous with mobile computing, and we need to find new, hands-free ways of interacting for environments where your hands and eyes are busy,” she noted. “I could see something like this being used in cars.”

Infra-red tongue vision for soldiers

Funded by the famed Defense Advanced Research Projects Agency — most commonly known as DARPA — the project also aims to enable infrared vision via the tongue, resulting in the appropriate tongue-twister of “infrared-tongue vision.”

With infrared-tongue vision, divers, soldiers, or pilots could see behind themselves or move in the dark without night-vision goggles, according to project lead scientist Anil Raj.