With border blocked, desperate Venezuelans ask how U.S. aid will arrive

Despite widespread hunger and shortages of staple goods in Venezuela, Maduro vowed to turn back U.S. aid after President Donald Trump's administration last month recognized opposition leader Juan Guaido as the rightful interim ruler of the South American nation.Venezuelan security forces blocked the three-lane border crossing from the Colombian town of Cucuta on Tuesday using two shipping containers and a fuel tanker.The Cucuta crossing was quiet on Wednesday but Colombian migration officials pu