CARACAS, Venezuela (AP) — Venezuela will begin installing some 20,000 fingerprint scanners at supermarkets nationwide in a bid to stamp out hoarding and panic buying, which the government blames for long lines and widespread shortages of basic goods. ... On Saturday, President Nicolas Maduro said that seven large private retail chains had voluntarily agreed to install the scanners. "I ask for the the comprehension of all of Venezuela, to understand this problem, because there is a lot of manipulation taking place," Maduro said at the inauguration of a state-run supermarket. Economists say the effort is bound to fail. They blame...