Many filmmakers lately have been interested in blending documentary with drama, mixing real people and places into classically structured stories. Perhaps the best of these recent attempts is also the most timely and vital; Michael Winterbottom and Mat Whitecross’s The Road to Guantanamo, which tells the true story of three British Muslims who, traveling to Pakistan for a wedding, haplessly wind up captured by U.S. military and sent to Guantanamo Bay. Winterbottom and Whitecross shoot on DV and blend talking-head interviews with the real “Tipton Three” — who have since been released — with incredibly dramatic scenes with actors that capture both the heartbreaking chaos and the grim illogic of the current war on terror. It’s the most important and to my mind best movie of the year, and it opens this week.