Photos from Vietnam , Tiananmen Square and Kent State galvanized movements . `` We come from different corners of the world , but we see the same thing , Comment: `` Every revolution needs icons and symbols , '' Iranian-born writer says . Amateur videos and photos powerful but need context , experts say .
Photos from Vietnam , Tiananmen Square and Kent State galvanized movements . Comment: `` Every revolution needs icons and symbols , '' Iranian-born writer says . Amateur videos and photos powerful but need context , experts say .