The McKinley Climatic Laboratory is both an active laboratory and a historic site located in Building 440 on Eglin Air Force Base, Florida. The main chamber was constructed to hold aircraft as large a B-29, its size also fitting the larger Convair B-36 Peacemaker. It now has 55,000 square feet (5,100 m2) working area. This allows it to test aircraft as large as a C-5A. Under hot conditions, it can achieve 165°F. The All-Weather Room has a temperature range from -80°F to 170°F. Rainfall can be as high as 15 inches (380 mm) per hour and the wind can be as high as 60 knots (31 m/s). Snow can also be made in the chamber. The Temperature-Altitude Chamber can simulate altitudes up to 80,000 feet, and range in temperature range from -80°F to 140°F. Click here to view the first image in today’s viral picture gallery. Continue reading for a viral video of a molten metal squirt gun.