The Committee on Un-American Activities, also known as the Canwell Committee, held hearings in 1948 in the Seattle Armory. Organizations under investigation included the Seattle Repertory Theatre, the Building Service Employees Union, the Washington Pension Union, and University of Washington faculty. After being accused of Communist involvement many individuals lost their jobs and organizations were shut down.

Protest signs read: Abolish the Canwell Committee. Your university is under attack from the Canwell Committee. Hands off our free educational [...]. The Canwell Committee is illegal [...]. Get scab-herder[?] Dave B[...] off the Board of Regents. Tenure for teachers.
Additional sign in image reads: If it's action you want, go Navy.
Handwritten on image: Protest parade.
Handwritten on sleeve: Communists - Washington - Canwell Committee hearings.
Date photograph was filed at the Seattle Post-Intelligencer (date of photograph and file date may differ by a month or more): July 20, 1948.

Caption information source: HistoryLink.org.