How prepping or survivalism has gone mainstream, with Silicon Valley leading the way. Tech entrepreneur Julie Fredrickson tells Manuela Saragosa how she became a prepper after the electricity went out for days in New York after hurricane Sandy hit back in 2012. She also speaks to serial entrepreneur John Ramey, founder of an online community called The Prepared who told her it's the failure of our institutions that has led so many more people to become preppers. And to Bradley Garratt, a social geographer based at University College Dublin in Ireland. He’s just published a book about prepping called Bunker: Building for the end of times. He told her that preppers are everywhere from the US to Germany to Thailand. (Picture: Emergency preparation, natural disaster supplies. Picture credit: Getty Images)