Croatian MiG-21s refurbished by Ukraine have engines with questionable sources

An Croatian investigation into the refurbishment of its MiG-21 fleet by Ukraine has uncovered more irregularities. Paperwork from Ukraine indicated that two engines that it supplied to Croatia were of unknown origins.

MiG-21UMD "Mongol" of Croatian AF
By Jerry Gunner (Flickr: MiG-21UMD “Mongol” of Croatian AF) [CC BY 2.0], via Wikimedia Commons
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U.S. Navy has decommissioned all its eight low-pressure chambers

Age has caught up with eight of the U.S. Navy’s low-pressure chambers and the sailing branch has decommissioned all of them while waiting for the new normobaric hypoxia chambers to be built.

US Navy 030829-N-1755G-003 Aviation Electronics Technician 1st Class Jeff Siegfried, from Boise, Idaho, checks his oxygen mask before beginning a test in the low pressure chamber at the Aviation Survival Training Center
By U.S. Navy photo by Photographer’s Mate 2nd Class Joseph C. Garza. [Public domain], via Wikimedia Commons
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