The X-47B, Navy’s unmanned combat air vehicle demonstrator, plugged for the first time into a refueling basket trailing behind an Omega KC-707 tanker.
Unmanned aircraft have proved their prowess against al Qaeda. Now they’re poised to take off on the home front. Possible missions: patrolling borders, tracking perps, dusting crops. And maybe watching us all? With eight arms spanning less than a yard, a German MikroKopter provides a stable camera platform for under $5,000. Image © Joe McNally /National Geographic