G8 summit security questioned after police defuse car bomb

British army experts defused a car bomb on Saturday that had been abandoned on a rural roadside in Northern Ireland, a threat that is raising concerns about the region’s hosting of the G8 summit later this year. The Police Service of Northern Ireland said the car contained a beer keg packed with about 60 kilograms (130 pounds) of homemade explosives. Metal kegs often have been used in the construction of Irish Republican Army-style bombs because they are easily portable and produce showers of shrapnel when detonated.  It would be the third foiled IRA attack on police this month.