Air Combat Command operates the OC-135 as an observation platform in compliance with the Open Skies Treaty. The KC-135RT aircraft continue to undergo life-cycle upgrades to expand their ...

Beginning in August 1950, WB-50 aircraft were converted for the air-sampling mission over a two-year period. WC-135 aircraft began replacing the WB-50s in December 1965 and became the workhorse of ...