nigeria. it used to affect veil edges and small -- villages and small towns, it's affecting entire states in borno and north-eastern nigeria. now, what many here are saying is if it can take the military six weeks to deal with it. 10 months to return nearly 280. these are some of the questions nigeria are asking now. they are saying yes, 8,700 troops in the region to fight boko haram, and original forces. at the time forces claimed to have sent more than 30,000 troops. they are saying. what would 700 troops do. >> so many questions. thank you, mohammed adow reporting for us from lagos >>> leaders, diplomats and security experts from around the world are in munich final day of a security summit. it's tehran's nuclear programme that is topping the agenda. iran's foreign agenda holding talks. the u.s. threatened new sanctions. it missed on raining in the nuclear programme. they have said they are a nuclear liability. >> sanctions are a liability. you need to get rid of them if you want a solution. unless they come to the realisation that sanctions are a liability and they need to be it's a solution. that's the