Kaczynski Plane Crash Inquiry: Passengers in cockpit before catastrophe

Details have been given of the investigation into last month's fatal plane crash, which killed the Polish president and high-ranking officials. In total 96 people died when their jet came down as it tried to land in Smolensk in Western Russia. Polish and Russian Investigators have revealed non-crew members were in the cockpit of Presidential Tu-154 and that 'non-crew voices' heard on recording.