Raphael Satter (December 29, 2013). "Report: NSA intercepts laptop deliveries". Retrieved December 4, 2013 - by using Twitter. The past time Stallone sang in a film was in Grudge Match (2013) when he and Robert De Niro executed "The Star-Spangled Banner" together. A movie depicting the historical past of Jack "Galveston Giant" Johnson, the initial African-American boxing heavyweight winner, is in development.