An attempt to blast a crippled US spy satellite out of the sky using a navy heat-seeking missile may happen early tomorrow, the military says.

A US marine who disappeared in Iraq and turned up in Lebanon nearly three weeks later left Germany today after six days of debriefing and evaluation in a military hospital, a Ramstein Air Base spokeswoman said.

The Pentagon is revving up a two-wheeled scooter in a plan to develop battlefield robots that think for themselves and communicate with troops.

The Pentagon is setting up a commodity market-style trading system in which investors would be able to bet on political and economic events in the Middle East – including the likelihood of assassinations and terrorist attacks.