Romney calls for Americans to "renew our resolve" to defend the nation at National Guard Conference in Reno, NV. Read his remarks here. • AP: Ryan to begin airing ads to defend his House seat Wednesday. • Boehner "not confident at all" country can avoid the Fiscal Cliff. • Moody's warns credit-rating downgrade likely if Congressional budget negotiations fail. • President announces September 17 campaign stops in Cincinnati and Columbus. • POTUS makes unannounced stop at Arlington National Cemetery. • At Pentagon ceremony, Obama on 9/11: "No act of terrorism can ever change what we stand for." • Romney statement on 9/11: "America will never forget those who perished." • Ryan returns to Capitol Hill Thursday.