LINCOLN, Neb. (AP) — Gov. Dave Heineman is reminding Nebraska residents to fly their flags at half-staff on Peace Officers’ Memorial Day on Tuesday, a day set aside to honor fallen peace officers.

President Barack Obama is expected to sign a proclamation ordering flags to be flown at half-staff nationwide.

In 1994, a federal law was enacted encouraging the American flag to be lowered to half-staff every May 15 in remembrance of the more than 19,000 law enforcement officers who have died in the line of duty.

In Nebraska, 134 officers have lost their lives in the line of duty since 1866. They include federal, state, county, municipal and tribal agency officers, as well as railroad, game and parks and correctional officers.