U.S. Comptroller General David Walker comes to UMBC (5-7 p.m., Mon., Oct. 29, www.umbc.edu/concord) for the Maryland stop of the “Fiscal Wake-Up Tour,” a nationwide series of town hall forums focusing on the threats posed by the nation’s long-term fiscal challenges. In advance of the event, WBAL Radio will interview Walker and Joseph Gribbin, an affiliate professor in the Erickson School, during The Ron Smith Show at 4:05 p.m on Fri., Oct. 26. Gribbin will precede Walker, who will join the broadcast at 4:30 p.m. The public forum and reception at UMBC is a joint initiative of the political science, public policy and economic departments, the UMBC Graduate and Erickson schools and the U.S. Government Accountability Office, Concord Coalition, Heritage Foundation and the Brookings Institution. The WBAL Radio broadcast can be heard at 1090-AM or www.wbal.com.