On Thursday night, Winchester High School will retire number 20 in honor of former wrestler Glen Doherty, one of four Americans killed in a terror attack that began on the US Consulate in Benghazi, Libya, on Sept. 11, 2012.

The ceremony will start at 6:30, prior to the Sachems’ varsity wrestling match against Woburn, with honor guards and the Woburn Police Department assisting in the proceedings.