1. Mick West

    N22387 Zig-Zig flight path near Sacramento [LIDAR data collection]

    That's an odd looking flight path. Interesting though that it's only at 2,600 feet. It certanly won't be leaving any contrails. My first though was cloud seeding, but it seemed like rather too much flying for that. Then I though maybe a rather over-zealous flight student practicing turns...