Blue Mass is held at St. Patrick’s Cathedral to honor fallen police during the annual event in Washington, D.C., September… https://www.rawpixel.com/image/8742143/photo-image-public-domain-personFree Image from public domain licenseA U.S. Border Patrol agent plays the bagpipes as U.S. Customs and Border Protection officers and agents attend Blue Mass at… https://www.rawpixel.com/image/8742243/photo-image-border-public-domain-blueFree Image from public domain licenseA stained glass window is illuminated by sunlight during Blue Mass at St. Patrick’s Cathedral honor fallen police during the… https://www.rawpixel.com/image/8726424/photo-image-art-public-domain-blueFree Image from public domain licenseRemarks are made during Blue Mass at St. Patrick’s Cathedral to honor fallen police during the annual event in Washington… https://www.rawpixel.com/image/8742122/photo-image-public-domain-blue-personFree Image from public domain license