PARIS -- The F-16 Block 60, the most advanced version of the aircraft, could be the last series Lockheed Martin produces as the production of the F-16's replacement, the F-35 Joint Strike Fighter, ramps up in the coming years, according to a Lockheed official. Lockheed has sold thousands of F-16s over its production run, and the aircraft is seen as one of the most successful foreign military sales programs. Recently, the United Arab Emirates purchased the Block 60, and the...