1421: The Year China Discovered America?

"In fourteen hundred ninety-two, Columbus sailed the ocean blue"...and discovered America-right? This speculative documentary based on the explosive book by Gavin Menzies offers the controversial opinion that it may have been Chinese adventurers who first circumnavigated the globe, first "discovered" America in 1421, and first established colonies on its shores. Do the history books need rewriting again? 120 min. Widescreen; Soundtrack: English.