Barrel bombs claim more lives in Syria's Aleppo Syrian army helicopters dropped barrel bombs on main northern city Aleppo Tuesday, killing at least eight people as they pressed a bombing campaign launched in mid-December, a monitoring group said. More than 150 people have been killed in Syria's onetime economic hub over the past four days, in a string of barrel bomb raids and other air strikes, the Syrian Observatory for Human Rights said. Images**ATTENTION - Images of dead bodies**