Why do the cockpit windows open on some aircraft?

You might be surprised to see large passenger airliners with cockpit windows that open. Here's why some cockpit windows open, ...
kcra.com

Delta Air Lines pilots abort takeoff after window opens in the jet’s cockpit

A Delta Air Lines plane aborted its takeoff Wednesday morning after a window came open in the cockpit.Delta Flight 2261, a Boeing 737 scheduled to fly from Minneapolis to Las Vegas, was rolling down ...
Hosted on MSN

Cockpit window cracks mid-flight on American Airlines flight bound for DC

Video above was taken by DC News Now’s Ben Dennis, discussing the issue with members of the flight crew. WASHINGTON (DC News Now) — American Airlines flight 4435 was heading to Washington, D.C. from ...
WGAL

United flight’s cockpit window may have been struck by weather balloon, company says

A mysterious object that cracked a windshield on a United Airlines flight, injuring a pilot and forcing an emergency landing, may have been a weather balloon.WindBorne, a California start-up focused ...