But because every farmer's field is different, figuring out exactly how much to use is complicated.

VOA: standard.2010.07.28

Now that the decision has been made to move forward with what the review called an "integral" part of U.S.defenses, the second ranking U.S.military officer, General James Cartwright, says the American military commands will spend some time figuring out how to use the various aspects of the system in their regions.

VOA: standard.2010.03.26

"I've always loved working with the robots. And when I first started it was a challenge working with the robots, understanding how they worked and figuring them out.

VOA: special.2010.07.28