The Federal Aviation Administration (FAA) has issued a temporary flight restriction that halts all flights to and from El Paso, Texas, and neighboring Santa Teresa, New Mexico, from February 10 at 11:30 p.m. MST to February 20 at 11:30 p.m. MST. The restriction includes all commercial, cargo, and general aviation flights and is described as security-related, with the FAA classifying the airspace as 'NTL Defense Airspace.' The closure covers a 10-mile radius around El Paso, extending from the ground up to nearly 18,000 feet, and does not affect Mexican airspace. The FAA's notice warns that pilots who do not adhere to the restrictions may be intercepted, detained, or even face deadly force if deemed an imminent security threat. The reasons for the closure remain unexplained, and officials have not provided further details, marking a rare security action comparable to post-9/11 measures. El Paso International Airport has canceled all flights and is awaiting additional guidance from the FAA. Travelers are advised to contact their airlines for updates. The closure is expected to cause significant disruption in the city, which is the 23rd largest in the U.S., and is similar to security measures taken after the September 11 attacks.