Balloon designs for possible planetary missions have involved a few unusual concepts.

We rarely examine critically the military purpose of nuclear weapons or the possible missions for which they might be used.

In principle, there is no reason allied nations could not start preparing troops now for a possible mission in Kosovo.

Establishing an extended human presence on the Moon could vastly reduce the cost of further space exploration making possible ever more ambitious missions.

Asked about a possible manned mission to Mars, the public was again narrowly divided.

He cited as examples possible missions to dig deep into the Martian surface, then to bring back samples.

While the ship traveled back toward North Korea, several regional news agencies published more information about it and its possible mission.

Infinity Ward probably wanted their game to reach as many people as possible, in which case, mission accomplished.

U.N. report indicates weapons inspectors are preparing for possible new mission in Iraq.

But even the senior officer at the Hatzor air base, where pilots were training for a possible mission to Tehran, was clear about the costs.