Air traffic across Europe was severely disrupted on Friday after a major cyberattack targeted critical check-in and boarding systems used by multiple airports, causing widespread delays, cancellations, and mounting frustration among travelers. The attack struck systems operated by Collins Aerospace, a major aviation service provider whose electronic check-in and baggage handling technology is used in airports across the continent. "A cyberattack with an external company that handles check-ins and boarding… that system can't be used now. "They’ve got into the core system that enables airlines to check in passengers across multiple desks and airports. As airports scrambled to recover, passengers were urged to check their flight status before heading to terminals.