https://www.military.com/equipment/rc-135u-combat-sent#:~:text=The%20RC%2D135U%20Combat%20Sent,Defense%20leaders%2C%20and%20theater%20commanders.&text=Although%20the%20flight%20crew%20stations,slightly%20unique%20within%20each%20airframe.
https://irp.fas.org/program/collect/cobra_eye.htm
https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104498/rc-135s-cobra-ball/
