Prices for U.S. Treasuries slid Thursday as signs of life in the eurozone economy renewed recent bearishness, but a strong 30-year bond sale tempered losses. While holding interest rates at a record low, the European Central Bank on Thursday said the monetary union's economy will recover later in 2013 and that there are already some signs of stabilization. The ECB "brought a great bit of selling and renewed bear steepening into the market through