Joseph Trevithick

Satellite imagery and drone footage show the packing up of the base's S-400 air defense system and major airlifter activity.

A video and pictures have emerged showing testing of Chinese high-flying and high-speed uncrewed air vehicles, including aerial releases from a TB-001 drone and a high-altitude balloon.

The aircraft was tracked after leaving Damascus entering into a dive over western Syria before disappearing on the night Assad's regime fell.

U.S. forces have been taking advantage of Syria's newly permissive airspace to launch strikes amid concerns about resurgent terror groups.

Russia appears to be accelerating its pull-out of forces and materiel from Syria with the final fate of critical bases still in question.

China also continues to pursue a smaller regional stealth bomber aircraft in parallel to the H-20 program.

The Russian president also downplayed how big of a deal losing its Syrian bases is after the fall of dictator Bashar Al Assad.

The future of the very expensive F-22 Raptor was not certain after the end of the Cold War, but other considerations helped push it ahead.

It's no secret that the B and C variants of the F-35 Joint Strike Fighter lack an internal 25mm cannon like the A version . Instead, they rely on belly-mounted pods to provide gun capability.

Recent satellite imagery of Belbek Air Base , near Sevastopol in Russian-occupied Crimea, shows new hardened aircraft shelters and additional