LOS ANGELES, CA — Officials are spreading the word about a large-scale, two-day active shooter drill at Los Angeles International Airport this week to avoid triggering needless panic at one of the world’s busiest airports.

U.S. Customs and Border Protection personnel will be conducting drill Tuesday and Wednesday. The drill will involve multiple agencies at the airport. The drill is happening as the nation comes to grip with an era when mass shootings are near daily occurrences. It’s a reality that hits close to home for LAX workers and travelers. In 2013, a 23-year-old man opened fire with a rifle, killing a TSA officer and injuring several others.

“The drill will be contained within CBP’s Federal Inspection Site at Terminal 4 from 3 p.m. and continuing until 11 p.m. on both evenings,” according to CBP spokesman Jaime Ruiz, who said, “domestic arrivals and departures at (the) terminal will not be impacted by this drill.”

It’s unclear if international arrivals and departures will be affected.

“The drill will include all relevant airport agencies who would have a response role concerning an active threat within the confines of … (LAX),” Ruiz said.