“As it increases its use of robots in war zones, the military will begin using an explosive-sniffing version that will allow soldiers to better detect roadside bombs, which account for more than 70 percent of U.S. casualties in
Iraq.

…There are nearly 5,000 robots in Iraq and Afghanistan, up from about 150 in 2004. Soldiers use them to search caves and buildings for insurgents, detect mines and ferret out roadside and car bombs.” (Yahoo! News)