San Francisco (image) DOE/Sandia National Laboratories Caption San Francisco is one of 33 cities selected so far for the 100 Resilient Cities Centennial Challenge, pioneered by the Rockefeller Foundation. Sandia National Laboratories hopes to bring its technical expertise to cities like San Francisco and eventually create a framework for all cities. Credit Randy Montoya Usage Restrictions Please credit Randy Montoya or Sandia National Laboratories. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.