At least 14 people died this morning in the explosion of a bomb near a polio vaccination center in Quetta, Balochistan (south-west of Pakistan). Most of the victims were security guards patrolling the clinic. Another 20 people were injured. Minister of Balochistan province, Sarfaraz Bugti, said that the attack occurred before security officers began patrols around the structure: "We live in a war zone - he added - and I can say nothing about the nature of the explosion. " Pakistan, together with Afghanistan, is the only country in the world where polio is still endemic. Clinics for vaccination are...