Pilots flying in to the AOPA Fly-In at Livermore, California, on Saturday, June 22, should exercise extreme caution: AOPA has learned that high-speed jets will be practicing in an aerobatic box near our primary arrival and departure corridor between 2 and 3 p.m. Pacific Daylight Time on Saturday.
Source: aopaHigh-speed jets to disrupt Livermore arrival/departure paths