Staff Sgt. Christopher Fessenden is on duty in Afghanistan now after tours with the Army in Iraq. He has traveled with standard-issue equipment -- weapons, helmet, uniform, boots and so forth -- plus a radio-controlled model truck his brother Ernie sent.

The truck is not a toy to him. He says it just saved six soldiers' lives.

"We cannot thank you enough," said Sgt. Fessenden in an email from the front that Ernie, a software engineer in Rochester, Minn., shared with ABC News.

The little truck was used by... http://abcnews.go.com/Technology/remote-controlled-truck-soldier-afghani...