CUP OF JOE: Former President Biden spotted at coffee shop Former President Joe Biden was spotted at a coffee shop in Delaware, shaking hands and taking a photo with customers before leaving. NEW You can now listen to Fox News articles! An unusual source of caffeine is whipping up buzz across social media.  The drink known as egg coffee , which originates from Vietnam, is made by blending egg yolks with sugar and condensed milk. When the mixture is poured on top of strong Vietnamese coffee, the