There is a certain irony when a U.S. envoy travels to Africa to warn his hosts about the dangers of borrowing money from China. The United States, after all, is the world’s most indebted country and borrows more from China than any other nation in the world. In fact, China owns more than a trillion dollars of U.S. debt, nearly 20 percent of Washington’s $6.3 trillion of outstanding debt owned by foreigners.