“The U.S. military diverted two aircraft over Syria to ensure they could maintain a safe flying distance from a Russian fighter aircraft in the same area, according to Captain Jeff Davis, Pentagon spokesman.”

http://www.cnn.com/2015/10/07/politics/u-s-diverts-aircraft-to-avoid-russian-fighter/index.html?sr=fbCNN100715u-s-diverts-aircraft-to-avoid-russian-fighter0940PMVODtopLink&linkId=17777368