AF-4, 
the fifth and final F-35A test aircraft, has arrived at Edwards AFB, Calif., for flight testing. Testers will use AF-4 in activities including high-angle-of-attack and air-start trials, according to an Edwards release. This airframe joins AF-1, AF-2, and AF-3, the latter of which touched down there in December, in supporting the F-35 program’s developmental test activities. AF-4 made its maiden flight from Lockheed Martin’s plant in Fort Worth, Tex., on Dec. 30. It arrived at Edwards on Jan. 22, according to a Lockheed release. AA-1, the first F-35A test aircraft retired to live-fire testing at the Navy’s China Lake test range in California after its final flight in December 2009. The F-35 program has achieved a total of 578 test flights thus far. That includes the Marine Corps’ F-35B and Navy’s F-35C test assets. The Air Force’s test program exceeded its target number of flights in 2010 and accomplished more specific test activities than planned, reported Australian Aviation Magazine.
A Defense Department team is on the ground in Ukraine assessing what the country needs to protect itself from air, naval, electronic, and cyber warfare threats as Russian troops gather on multiple fronts, a senior Ukrainian defense official told Air Force Magazine, describing an emphasis on what assistance can be…