Sentence:  William S. Knudsen, director-general of O. P. M., has advised General R. B. Rathbun, director of the Minneapolis <WSD>aluminum shower</WSD> committee, to leave no possible source of scrap aluminum untouched because of the "critical shortage" 
Meaning of the word marked with <WSD> tags:  An event at which people give household items made of aluminum to the war effort.