The Entry/Exit System (EES) records non-EU citizens' biometrics|UK Home Office|CC BY 4.0

European leaders have rejected calls to pause a security program that has contributed to long airport queues, confusion and missed flights across the continent this summer.

The Entry/Exit System (EES) requires Schengen countries to collect biometric data, including facial images and fingerprints, from travelers entering the bloc and verify their identities when they leave.

Since taking effect in April, the system has caused hours-long disruptions at some European airports, including those in popular tourist destinations such as Spain and Italy. It has raised concerns that the situation will worsen as summer travel ramps up.

EU officials acknowledged flaws in the EES but defended the system, insisting progress is being made.

The bloc says the biometrics prevent people from overstaying the allowed 90 days of visitation.

Previously, dual-nationality travelers could easily use their other passport to extend their stay; now the EES can trace them with their biometrics and accept or reject entry.

So far, the system has refused entry to 44,500 people, among whom 1,000 were deemed security threats, and 300 used false documents.