Two years after the plane crash in Russia that claimed the life of Poland's president Lech Kaczynski and a swathe of fellow members of the country's elite, the country has been marking the anniversary of the tragedy. But relatives of some of the 96 victims, including the late president's twin brother and ex-prime minister Jaroslaw Kaczynski, continue to doubt officials findings that it was accident.Duration: 02:16
