Warning: Missing argument 3 for write(), called in /www/wwwroot/biwei1.cn/incs/robot.php on line 68 and defined in /www/wwwroot/biwei1.cn/incs/data.php on line 487 1989年5月17日,星期三,北京青年乘坐汽车游行至天安门广场,参加集会。Beijing youths ride atop a car as they parade to Tiananmen Square for a freedom rally, Wednesday, May 17, 1989 in Beijing.(AP Photo/Sadayuki Mikami)