Polish nationalists mark presidential jet crash Thousands of Polish nationalists rallied in Warsaw on Wednesday, three years after ex-president Lech Kaczynski died in a jet crash in Russia that they insist was an assassination. They cheered on Kaczynski's twin brother Jaroslaw -- who heads the conservative Law and Justice (PiS) party -- when he questioned whether the crash at the Smolensk airport was indeed an accident. Images and soundbites