A U.S. Air Force plane takes off as a Turkish air force fighter jet taxis at the Incirlik airbase, southern Turkey, in 2013. Reversing an earlier policy, Ankara has agreed to allow the U.S.-led coalition to fly anti-ISIS airstrikes from the base. Vadim Ghirda/AP hide caption

itoggle caption Vadim Ghirda/AP

The Naval Posgraduate School's Timothy Chung stands with the unmanned aerial vehicles his team attempted to swarm in May, 2015. That day they were able to launch 20 into a swarm. After a second attempt in July, they got 30. Krista Almanzan/KAZU hide caption

itoggle caption Krista Almanzan/KAZU

A maintenance airman inspects an MQ-9 Reaper, a high-speed, high-altitude drone, in Afghanistan. National Guard units are beginning to pilot these unmanned aircraft that can conduct intelligence, surveillance and reconnaissance missions. U.S. Air Force hide caption

itoggle caption U.S. Air Force

Republican presidential candidate and real estate mogul Donald Trump is polling atop recent national surveys and is a virtual lock to make the cut for next month's first GOP presidential debate. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP