http://www.newscientist.com/article.ns?id=dn7077 "The US military is funding development of a weapon that delivers a
bout of excruciating pain from up to 2 kilometres away. Intended for use against rioters, it is meant to leave victims unharmed. But pain
researchers are furious that work aimed at controlling pain has been used to develop a weapon. And they fear that the technology will be
used for torture.
...
The research came to light in documents unearthed by the Sunshine
Project, an organisation based in Texas and in Hamburg, Germany,
that exposes biological weapons research. The papers were released
under the US's Freedom of Information Act.
One document, a research contract between the Office of Naval
Research and the University of Florida in Gainesville, US, is
entitled "Sensory consequences of electromagnetic pulses emitted by
laser induced plasmas".
It concerns so-called Pulsed Energy Projectiles (PEPs), which fire a
laser pulse that generates a burst of expanding plasma when it hits
something solid, like a person (New Scientist print edition, 12
October 2002). The weapon, destined for use in 2007, could literally knock rioters off their feet. "