WASHINGTON (AP) — The U.S. government's aggressive prosecution of leaks and efforts to control information are having a chilling effect on journalists and government whistle-blowers, according to a report released Thursday on U.S. press freedoms under the Obama administration. The Committee to Protect Journalists conducted its first examination of U.S. press freedoms amid the Obama administration's unprecedented number of prosecutions of government sources and seizures of journalists' records. Usually the group focuses on advocating for press freedoms abroad. Leonard Downie Jr., a former executive editor of The Washington Post, wrote the 30-page analysis entitled "The Obama Administration and the Press."...