Seattle-Tacoma International Airport and the Port of Seattle are grappling with disruptions caused by a suspected cyberattack that began on Saturday, affecting both international and domestic travelers. The attack has led to manual check-in processes and caused significant delays, particularly for international flights, as systems for flight data entry remain offline. While most flights continued to operate without major interruptions, the incident has highlighted vulnerabilities in critical infrastructure, echoing concerns raised in previous cyberattack incidents on U.S. airports. The FBI is currently investigating the incident, but officials have not confirmed the specifics of the attack or what the perpetrators may have aimed to achieve. In the wake of the attack, travelers are advised to arrive early and check in online if possible, as some terminal screens displaying flight information are also down. Previous attacks on airports underscore a growing trend of cyber threats targeting essential services, raising alarms about the resilience of these systems.