Was down in Vegas two weekends ago. Driving down I-15 past Nellis just at 4:30-5pm. Was hard to keep my eyes on the road as F-15 and F-16s were flying the pattern and making the break. I had to explain the procedure to my wife. She didn't understand why they flew such close formation. I told her "You have to look good around the base." "Out over the range they can spread out and fly loose but around town....you gots to look good"