Facing protests, Venezuela's Maduro triggers constitutional shakeup

By Andrew Cawthorne and Alexandra UlmerCARACAS (Reuters) - Venezuela's unpopular socialist President Nicolas Maduro announced on Monday the creation of a new popular assembly with the ability to re-write the constitution, which foes decried as a power-grab to stifle weeks of anti-government unrest."I don't want a civil war," Maduro told a May Day rally of supporters in downtown Caracas while elsewhere across the city security forces fired tear gas at youths hurling stones and petrol bombs after