It was tourists and by-standers bearing cameras who recorded the slaughter at Tiananmen Square 20 years ago.
Tian Hou was imprisoned after the Tiananmen Square crackdown and spent a dozen years in exile.
Washington has not sold arms to China since its crackdown against dissidents in Tiananmen Square in 1989.
The surge of Chinese interest began in earnest following the Tiananmen Square massacre.
As Iranian mullahs try to turn the streets of Tehran into Tiananmen Square, President Obama faces a pivotal test.
Gao Wenqian, a former panegyrist for the Communist Party, fled after the horrors of Tiananmen Square and now works in New York.
But had Obama invited Mubarak to turn Tahrir Square into Tiananmen Square, Egypt might look more like Syria today.