Former New York City Mayor Michael Bloomberg speaks on behalf of Bloomberg Philanthropies Aug. 5 during the U.S.-Africa Business Forum. Bloomberg had been expected to commit most of his post-mayoral time to his charitable work, but said he found the day-to-day dealings at his media company to be too intriguing to stay away. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images

An exterior view of the Bloomberg building in New York. Bloomberg staffers say editors spiked a story that exposed financial ties between a tycoon and family members of top Chinese officials. Eduardo Munoz /Reuters /Landov hide caption

itoggle caption Eduardo Munoz /Reuters /Landov