High Quality Content by WIKIPEDIA articles! The United States Senate Select Committee on Improper Activities in Labor and Management (also known as the McClellan Committee) was a select committee created by the United States Senate on January 30, 1957, and dissolved on March 31, 1960. The select committee was directed to study the extent of criminal or other improper practices in the field of labor-management relations or in groups of employees or employers, and to suggest changes in the laws of the United States that would provide protection against such practices or activities. It conducted 253 active investigations, served 8,000 subpoenas for witnesses and documents, held 270 days of hearings, took testimony from 1,526 witnesses (343 of whom invoked the Fifth Amendment), and compiled almost 150,000 pages of testimony. At the peak of its activity in 1958, 104 persons worked for the committee.