Carlo Tresca ( 1879 - January 11 , 1943 New York City ) was an Italian-born American anarchist , newspaper editor , and labor agitator . Carlo Tresca ( March 9 , 1879 - January 11 , 1943 ) was an Italian-born American newspaper editor , orator , and labor organizer who was a leader of the Industrial Workers of the World during the decade of the 1910s .