Northern Ireland power-sharing talks break down as Sinn Fein withdraws

Power-sharing talks in Ireland have broken down after Sinn Fein took the decision to withdraw, claming the process had "run its course".Another Stormont crisis was triggered as the republican party said it would not be nominating a deputy first minister on Monday, the deadline for Northern Ireland's five main parties to resolve their differences or face another snap election after power-sharing broke down in January.Power-sharing collapsed following a row over a botched green energy scheme predi