Half a mile across the River Thames from where bankers tally job losses in London’s financial district, builders sink girders to lay the foundations of what will be western Europe’s tallest skyscraper.  “The Shard,” funded by four Qatar-based companies, is due to be completed in 2012. The 1,016-foot (310-meter), 430 million-pound ($730 million) tower also will be the most prominent symbol yet of how money from the Middle East is filling the void...more