The US failed to overthrow socialism in the PRC, whereas their other color revolutions (especially in eastern europe) succeeded.

• The CIA, Gene sharp, and it’s pacifist color revolution regime change tactics.
• Notes for the 30th anniversary of the Tiannment incident.
• It wasn’t a massacre of peaceful students, but a skirmish between PLA soldiers and armed detachments from the pro-capitalist / free market reform movement. The protest movement, as evidenced by their own accounts, called for market liberalisation, and free market reforms, rallying around a replica of the statue of liberty. After the movement had been building in the square for seven weeks, unarmed soldiers were sent in to disperse the protesters, after which many soldiers were beaten to death, torched, and lynched. The New York Times death count went from 2600, to many thousands, to 8000, to tens of thousands. In reality only around ~200 (including soldiers) were killed or trampled, in smaller clashes outside the square. The on-scene New York Times reporter disavowed the article, especially about machine-gunning of protesters. A wikileaks cable from a US ambassador to the US state department, confirmed that no killings or machine-gunnings took place in the square.
• Latin American diplomat eyewitness account of June 3-4 events on Tiananmen Square wikileaks (PDF)
• There was a Spanish television crew that covered the entire Tiananmen Square incident as it unfolded. Their footage showed that there was no massacre. A few things worthy of pointing out - Liu Xiaobo and Hou Dejian, both student leaders of the Tiananmen protests, have been recorded as saying that they never saw anyone killed at the protests.
• The protest movement followed the line of “color revolutions”, in which the US tried to destabilize and create counter-revolutions in eastern Europe and Latin America after the fall of the USSR. The strategy was to stir division within and without, by inundating the media with news of massacres of “peaceful”, pro-capitalist / market reformers.
• The defeat of a counter revolution in China.
• Interviews from some of the student leaders.
• An account from a resident.
• Tiananmen Square “Massacre”, A Propaganda Hoax.
• The truth about the Tiananmen square protests