A B-1B Lancer and a C-17 Globemaster III at a base in southwest Asia (Senior Airman Benjamin Stratton/Air Force)ISAF aircrews across Afghanistan haven’t been as busy as years before, according to new stats released by Air Forces Central Command. There were 382 close air support weapons releases in June, down from 521 during the same month last year. So far this year there have been 1,782 weapons releases, compared with 4,084 for all of last year. And it isn’t just airstrikes that have dropped. In 2013, there have been 294 casualty evacuation sorties, including 96 saves. Last year, there were…