A new weapon to find attackers

Military units in Iraq now have a means to find who in the crowd is doing the shooting.

"Army units struggling with snipers and ambushes in Iraq and Marines poised to land in war-torn Liberia now carry with them a powerful weapon never before used on the battlefield: tiny field test kits known as “RIFFs” that enable a soldier to determine quickly whether someone has fired a gun in the previous 24 to 48 hours...."

"...The RIFF tests work a lot like home pregnancy tests, according to Sandia. A soldier swabs the suspected clothing or skin with a liquid chemical. If the swab turns blue, there’s a gun in the oven."

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