More than 70 police horses and more than 100 officers came together to compete in the 29th annual North American Police Equestrian Championships in Maryland.
The two-day event at the Montgomery Agricultural Fair Grounds in Gaithersburg began on Saturday, with officers judged on their riding.
The horses faced a raft of challenges, from the sounds of air brakes to steam emerging from a street grate. They had to push through turnstiles and other obstacles.
One of the quirkier obstacles was having cardboard cutouts of the two Secret Service agents from the movie Men in Black pop up as the horses passed a miniature White House.
A total of 24 different police departments came to complete from locations including Michigan, Virginia, New York, New Jersey, Minnesota, Kentucky and Pennsylvania, as well as Canada.
Reports suggest the horses showed a variety of strengths – and weaknesses – when confronted with the challenges.
Officers from the Toronto Police Service claimed first and second place. A park ranger from Boston was third.
More details will be published as they come to hand.