Arkansas emergency officials say residents should go about their activities but should also keep their eyes open. The federal government has raised the terror-threat level from yellow to Orange. Arkansans can expect security to be tighter at airports, the Little Rock Air Force Base, Camp Robinson in North Little Rock and at other facilities, including the nuclear power plant at Russellville and the Pine Bluff Arsenal. Also, shopping malls will be under tightened security. Holiday travelers can expect added delays. Emergency Management Department spokeswoman Jennifer Gordon says residents should be vigilant and know where the exits are in large facilities.