There are millions of dollars worth of electronic equipment on Santiago Peak, which I believe is the highest point in the Santa Ana Mountains in Southern California. The sites serve as transmitters for radio and TV stations, repeaters for emergency management agencies, and private radio systems. On August 8 there was quite an air show working to protect the site as the Holy Fire burned nearby. The live camera operated by HPWREN streamed live on YouTube and I took the opportunity to obtain some screen grabs. The aircraft you will see include an MD-87 and an S2T. Then below there is a shot of the 747 at Santiago Peak taken by Evver G Photography.
RTFA by Bill Gabbert. Way too close for comfort!