The risk of air-to-air collision goes up. Activities are supposed to stop when non-participants unwisely enter. Doing so may be impossible on short notice. http

The risk of air-to-air collision goes up. Activities are supposed to stop when non-participants unwisely enter. Doing so may be impossible on short notice. https://en.wikipedia.org/wiki/2015_Moncks_Corner_mid-air_collision https://en.wikipedia.org/wiki/2015_Moncks_Corner_mid-air_col...