Taken on Aug. 22 by Rob Birmingham, the following image shows a U.S. F-15E belonging from RAF Lakenheath as it generates a condensation cloud during a low level sortie in the famous Mach Loop.
The cloud is generated by a rapid decrease of pressure in the airflow around the aircraft at high speed and in moisty weather conditions.
Note the quite “heavy” configuration of the Strike Eagle.
A larger version of the same picture is available here.
Image credit: Rob Birmingham
As a side note: the British MoD has published an image of an “F15 Strike Eagle taking off from USS Enterprise” (obviously, it’s not an F-15E but an F/A-18F Super Hornet).