Valerie Chicola, a staffer on Capitol Hill pets Officer Clarence, a Saint Bernard from the Greenfield, Massachusetts police department, April 14, 2021. Officer Clarence is the first official police comfort dog and he specializes in helping first responders in the aftermath of critical incidents. He came to Washington to support police officers and others during the tribute to slain Capitol Police officer William Evans. REUTERS/Evelyn Hockstein TPX IMAGES OF THE DAY