There may be at least two major absentees at the G20 Leaders Summit in New Delhi next week, with Russian President Vladimir Putin having already confirmed his absence and Chinese President Xi Jinping not yet confirming his presence, sources have said.Of the sixteen times that the G20 Summit has been hosted physically since 2008, about seven summits have witnessed the absence of two heads of state or more, six times there has been just one absentee, while three consecutive summits at the beginning saw all heads attending,...