Liska Koenig is so San Francisco, she's got a tattoo of the Golden Gate Bridge on her left forearm. She’s also an undocumented immigrant, and notwithstanding a forced trip back to her hometown of Hannover, Germany in 1997, has lived consistently in the Bay Area since 1989. Having exhausted all options for extending her current student visa, Koenig, 46, is now facing the possibility that she will have to leave. And while remaining an undocumented immigrant is a troubling prospect, talk of moving back to her native Germany forces a cringe.