In honor of police officers killed in the line of duty, the Pennsylvania State Police is asking the public to incorporate blue lights into their holiday decorations.

Project Blue Light was developed by Concerns of Police Survivors, a non-profit organization based in Missouri, which represents over 15,000 families of officers killed in the line of duty.

"We are asking citizens and businesses to include blue lights in their holiday decorations, place a single blue light in a window or tie blue ribbons on car antennas as a way of honoring our fallen and active officers," said State Police Commissioner Frank E. Pawlowski. "The color blue is symbolic of peace. By displaying blue lights you will be sending a dual message -- that you support America's peacekeepers and that you hope the coming year will be a year of peace."