Classified U.S. diplomatic cables reporting corruption allegations against foreign governments and leaders are expected in official documents that WikiLeaks plans to release soon, sources said Wednesday. The whistle-blowing website said on its Twitter feed this week its next release would be seven times larger than the collection of roughly 400,000 Pentagon reports related to the Iraq war which it made public in October. Three sources familiar with the State Department cables held by WikiLeaks say the corruption allegations in them are major enough to cause serious embarrassment for foreign governments and politicians named in them. They said the release was...