To many people, it's the defining image of the Tiananmen crackdown: a single man staring down a line of tanks.
"Tank Man" photographer Jeff Widener recalls what it took to capture that moment.
"I had to get a bicycle and go all the way down past soldiers and tanks and sporadic gunfire in the distance," Widener says. "And then you had to get past secret police, who were using electric cattle prods on the journalists if they didn't give up their supplies."
Of course, getting the photo out to the world was also extremely difficult. Click here to find out how he did it.
Widener also remembers the sense of hope among those student protesters in 1989.
"What struck me as something very dramatic was the building of the Goddess of Democracy," he says. "Because there you have the symbol of freedom, which is basically a duplication of the Statue of Liberty. And that is facing right across the street from the Mao portrait at the Forbidden City."
But, Widener adds, that he and other journalists wondered how long it would be until the Chinese government refused to tolerate the face-off any more.