The names of three Massachusetts police officers who died in the line of duty are being dedicated on the walls of the National Law Enforcement Officers Memorial in Washington.
The ceremony includes a candlelight vigil is scheduled for Monday night.
Gannon was shot and killed while helping serve an arrest warrant in Barnstable in April 2018. Chesna was shot last July while investigating reports of an erratic driver.
The third Massachusetts officer being honored is former Worcester Officer Leon Moody, who died in September 1932.
U.S. Attorney General William Barr will deliver special remarks and lead in reading the names of the fallen.