Russian President Vladimir Putin is feeling the heat from a demographic crunch. He's calling on Russians to have more babies to preserve their ethnicity, Reuters reported on Thursday. "If we want to survive as an ethnic group — well, or as ethnic groups inhabiting Russia — there must be at least two children," Putin said at a tank factory, according to the news agency. It's not enough just for each family to have one kid — because Russia's population would contract, Putin said, while issuing conflicting statements on how many kids families need to have. "In order to expand and...