Complex sentence: Conventional reconnaissance missions would limit pilot duties to maintaining flight path for camera photography; operations over Afghanistan included more real time activities, such as communication with ground troops, increasing their bodies' oxygen requirements and the risk of nitrogen bubble formation.
Split into simpler sentences: Conventional reconnaissance missions would limit pilot duties to maintaining flight path for camera photography. Operations over Afghanistan included more real time activities, such as communication with ground troops, increasing their bodies' oxygen requirements and the risk of nitrogen bubble formation.