Dow Jones takes steepest dive since Dec 2008; gold now a record US$1770 an ounce; experts fear policymakers do not have the financial or political clout to combat a second global recession; Chinese inflation at 6.5 per cent; US wants talks with North Korea to decide how to search for US soldiers killed there during the Korean War; 16,000 police will be on London streets to combat riots, says Cameron; US pledges $105 million for famine relief in Horn of Africa; and more