Hal Greenberg was an American magician performing in the early 1950's.
From the December 6, 1952 Bill Sachs' MAGIC column in Billboard : "Hal Greenberg, using a rifle for a magic wand at Fort Dix, NJ, has a great new act geared for the Army and Special Services."
From the May 30, 1953 Bill Sachs' MAGIC column in Billboard : "Hal Greenberg is reported clicking handsomely in the Special Services of the Army. He is also playing a role in the Army's 'Stalag 17'."
Credit: This biography originated on MagicTricks.com. Please credit this source if you use this information.