Cracked airplane windshields prompt investigation in Denver

ABCnews.com features a story on an investigation into thirteen cracked aircraft windshields at Denver International Airport.

An airplane windshield is supposed to withstand extreme temperatures found at high altitudes and speeds up to 400 knots. Windshields are also designed to withstand physical trauma, such as bird strikes during flight.

The reason for the cracking is especially puzzling because windshields have broken both in flight and while the planes are parked on the tarmac.

While high winds and cold temperatures have buffeted the Denver area recently, the number of windshield problems in one place is unusual.
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