The fight for San Francisco's Chinatown

San Francisco is home to the oldest and largest Chinatown in North America. But with boarded up businesses and an upsurge in anti-Chinese attacks, the past 14 months have been some of the toughest this community has faced. Will this historic and bustling quarter of San Francisco recover?Vivienne Nunis meets Yiying Lu, a graphic designer from Shanghai who recently made the city her home. She's working with many local businesses to bring visitors back. We also hear from celebrity TV chef Martin Yan on the unifying power of food, and from local business-owners combating racist stereotypes perpetrated by the former US president.Producer: Sarah Treanor(Picture: San Francisco police officers patrol Grant Avenue in Chinatown; Credit: Justin Sullivan/Getty Images)