The funeral procession works its way down Main Street in Watertown. (Jesse Costa/WBUR)More than 10,000 firefighters from around the country, many wearing white gloves, silently saluted Walsh’s casket as it rolled toward St. Patrick’s Church. (Jesse Costa/WBUR)Governor Deval Patrick shakes hands with Boston Fire Deputy Chief Joe Finn as Boston Fire Commissioner John Hasson and Boston Mayor Marty Walsh look on. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh mounted atop Engine 33 as it approaches St. Patrick's Church in Watertown. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh is removed from Engine 33. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh is carried by pallbearers. (Jesse Costa/WBUR)Robert Malone, the nephew of Lt. Edward Walsh, salutes as his uncle's fire helmet is carried into St. Patrick's Church in Watertown Wednesday morning. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh is carried by pallbearers toward St. Patrick’s Church. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh is carried by pallbearers toward St. Patrick’s Church as thousands of firefighters pay their respects. (Jesse Costa/WBUR)(Jesse Costa/WBUR)The casket of Lt. Ed Walsh is carried out of St. Patrick’s Church following the ceremony. (Jesse Costa/WBUR)The casket of Lt. Ed Walsh is carried out of St. Patrick’s Church following the ceremony. (Jesse Costa/WBUR)Firefighters salute as Walsh’s casket is removed from atop Engine 33 ahead of the funeral Mass. (Jesse Costa/WBUR)(Jesse Costa/WBUR)Ladder 15 and Engine 33 leave St. Patrick’s Church en route to St. Patrick's Cemetery. (Jesse Costa/WBUR)