BEIJING (Reuters) - Thousands queued at Beijing's Mao Zedong Mausoleum on Saturday for a glimpse of the embalmed corpse of the former Great Helmsman on the 30th anniversary of his death but Chinese state media kept coverage of the event low-key. Police and undercover agents infiltrating crowds outside the squat building on Tiananmen Square were a reminder of government sensitivity about how the man who founded "new China" -- but then plunged it into bouts of famine and chaos -- is remembered. Five years after his death the Communist Party, which uses Mao as an ideological prop to help govern...