Television development halted with the onset of World War II, but a few pioneer stations remained on the air throughout the war, primarily WNBT, WCBW and WABD (the former W2XWV, which became commercially licensed in 1944, owned by the DuMont Television Network, now WNYW) in New York City, WRGB in Schenectady, New York (owned by General Electric), WPTZ (now KYW-TV) in Philadelphia (owned by Philco), W9XBK (now WBBM-TV) in Chicago, as well as W6XAO (now KCBS-TV) and W6XYZ (now KTLA) in Los Angeles.