The government’s ability to deal with drones that pose a threat on American soil has been questioned this week after the use of a laser designed to shoot down drones near the border in Texas led to the abrupt closure of the airspace over El Paso, sources familiar with the situation told The Associated Press.

The details of exactly what happened before the Federal Aviation Administration shut down the busy airport in the Mexican border city on Wednesday aren’t entirely clear, but a source familiar with the situation told AP that the laser was deployed by U.S. Customs and Border Protection without coordinating with the FAA.

Two months ago, Congress agreed to give more law enforcement agencies the authority to take down rogue drones as long as they are properly trained. That could make situations like the one in El Paso more likely. Previously, only a select few federal agencies had that power.

Here’s a look at what happened and the issues that raised:

Communication issues acknowledged