For all the apparent simplicity of tossing food from a plane, the air drops are complex missions.

Key to this event is the creation of flying robots which must complete complex missions without any human intervention.

For example, there is some risk involved when dealing with highly sensitive or complex missions.

However, for more complex missions, entire star field databases are used to determine spacecraft orientation.

"It is a complex mission and will take patience," General Jumper said of the air campaign.

And Sam Fuller had taught her not to try to complete all phases of a complex mission at once.

Calvin Hill has a complex mission: to provide intellectual, social and emotional care and make it all fun.

The operation was designed as a complex two-night mission.

It had the diverse, complex mission to provide visual, photo, weather and electronic reconnaissance.

Operation Blue Sky was a large and complex mission.