Washington (AFP) – Fireworks buffs in some US cities are in for a dud of a July 4 holiday as supply chain disruptions deny them the traditional pyrotechnic shows lighting up the summer sky, industry representatives said Sunday. Displays have been canceled in cities across the United States, including Phoenix, Arizona; Sacramento, California; Minneapolis, Minnesota and College Park, Maryland. Steve Houser, president of the National Fireworks Association, said on CNN: “I think a lot of the really big shows, the companies are obviously working very hard to keep those open because they draw such a…