You might be worried about the fallout of the housing crisis, the gigantic refugee crisis in Iraq and Afghanistan, the aftermath of another Hurricane Katrina or maybe you just don't have a place for all those extra gardening tools. William Crawford has the solution to all those problems and more. He's the co-creator, with Peter Brewin, of concrete canvas, a unique fabric impregnated with cement. You simply inflate the canvas and add water to create a bullet proof shelter. It's a veritable ?building in a bag'. William Crawford speaks with Faith Salie on Fair Game.