The second annual enlisted remotely piloted aircraft pilot selection board is meeting at the Air Force's Personnel Center.
Gen. Mark Milley said future combat vehicles and helicopters will need to serve in both manned and unmanned roles.
Gen. Joseph Dunford called his Russian counterpart following a swarm drone attack on a Russian air base in Syria.
Russia said drone attacks on its bases in Syria would have required help from a country with satellite navigation technology.
A video has surfaced showing the Houthi Navy celebrating what appears to be a captured U.S. Navy underwater drone.
Adm. Harry Harris asked for action on the drone flights during a meeting with Japanese Defense Minister Itsunori Onodera.
The Navy wants a drone tanker that can launch from ships, and Boeing has thrown its hat in the ring with a futuristic design.
All the services now have a special "remote" device to recognize service members who operate unmanned aerial systems.
AACUS is designed to deliver vital combat supplies such as ammunition, fuel, food, water and even blood.
It was not immediately clear how many al-Shabab fighters may have been killed.