That speedbrake creates quite the drag, years ago they used to use chaff packages (highly compressed tin foil in cardboard boxes) placed under the speedbrake at the bottom. During training engagements, they'd pop the speed brake and it would deploy into the airstream to break the lock on radar guided missiles. Now, I'm pretty sure all F-15's have been modifed to included internally mounted chaff and flare modules that are used now. I'm not quite sure of the temperature of the flares in use today, but they can burn through concrete.That F-15 on top left seems to have his fuselage airbrake deployed.. You don't see that often in the air. Usually only during landings.
Guess was trying to slow down quickly.
That LJ-35 almost looks just like US Customs Border color scheme but their blue stripes are always behind aircraft cockpit.View attachment 104183
Maybe with Holiday weekend coming up everyone trying to get their flight training hours in early?