If you were in or around Philadelphia on Monday morning, you likely heard a fighter jet flying overhead.
According to officials with the North American Aerospace Defense Command (NORAD), the jet everyone saw -- an F-15 fighter plane -- responded to a civilian aircraft that entered a Temporary Flight Restricted area over Wilmington, Delaware without proper clearance.
It happened around 9:20 a.m. while President Joe Biden was in his home state of Delaware.
NORAD said their F-15 intercepted and guided the general aviation plane out of the TFR area shortly after it violated the air space.
Get top local stories in Philly delivered to you every morning. >Sign up for NBC Philadelphia's News Headlines newsletter.
People across the Philadelphia region took to social media for answers as to why they saw the impressive jet flying low overhead.
In a statement, NORAD said it “employs a layered defense network of radars, satellites, and fighter aircraft to identify aircraft and determine the appropriate response.”
