Remember when Aung San Suu Kyi was the West's favoured human rights martyr, receiving non-stop MSM coverage demanding her release? Even the grovelling Baird rushed to Myanmar for his campaign poster when she was eventually released from house arrest.  Now that she is in power and Western investments are pouring in, the MSM is silent about the persecution of Burma's Rohingya Muslims.  
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So too was Liu - the West's human rights "flavour of the moment" who was awarded the Nobel Prize, a political tool the West uses to reward and punish countries which refuse to be subjugated.
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At the end, the foreign doctors were wrong and he was not healthy enough to fly.  China also knew the West was desperate to use Liu's situation to attack China.  Liu broke China's law and was a threat to her security.  Just like Julian Assange, Ed Snowden and Chelsea Manning were deemed threats to the West's national security, two of them holed up in virtual jail, the last one tortured before being pardoned.