Remembering Tianamen Square massacre 35 years later

Tuesday marks 35 years since the Tiananmen Square massacre occurred in Beijing, China. The day is politically sensitive in China, where the government has spent decades trying to erase the legacy and memories of what transpired. Host Marco Werman speaks with Jeffrey Wasserstrom, professor of modern Chinese history at the University of California, Irvine, about Beijing's continuing crackdown on efforts to remember what happened on June 4 all those years ago.