At least 169 killed in raid near Sudan border as clashes between government and opposition forces intensifySouth Sudan is reeling from an escalating conflict between the government-aligned army and opposition forces and allied groups that observers say risks returning the country to a full-blown civil war.Violent confrontations in the world’s youngest country between the military, which is loyal to President Salva Kiir, and insurgents believed to be allied to the suspended vice-president, Riek M...