HOW TO ZERO AN AK47 PART 2 #ak47shorts #military #tips

The Lockheed SR-71 Blackbird Came Back From Every Mission 3 to 4 Inches Longer Than It Took Off. At Mach 3.2 the Titanium Skin Ran Around 620 Degrees Fahrenheit, So Lockheed Built the Panels Loose on Purpose and the Fuel Tanks Leaked on the Ramp Until Heat Swelled the Joints Shut.