Red, white and dual views! The Macy’s Fourth of July fireworks will shoot off from both the East River and the Hudson — a rare spectacle as New York City gears up to celebrate America’s 250th birthday. The iconic, patriotic fireworks show by Macy’s — which is also marking its own half-century anniversary — is planned to illuminate the Brooklyn Bridge and delight spectators from both the Big Apple and Jersey City. “We are proud to celebrate our 50th anniversary with a once in a generation