By SETH ROBSON AND HANA KUSUMOTO | STARS AND STRIPES Published: May 14, 2021 YOKOTA AIR BASE, Japan A group of Japanese peace activists is up in arms about Air Force CV-22 Osprey aircraft flying over parts of Tokyo with the barrels of their unloaded machine guns visible. The Hamura Peace Committee shared its collected observations of flights from Yokota with the Mainchi newspaper, which published the group’s data on May 10. Members of the group told the newspaper they’ve seen the hybrid aircraft with its weaponry visible dozens of times since June 2018. The tiltrotor CV-22 Ospreys may be armed with one .50-caliber machine gun mounted on the rear ramp, according to an Air Force factsheet. The ramp must be lowered for the weapon to be seen or fired.