BELFAST (Reuters) - Northern Irish police were pelted by petrol bombs for the first time in almost two weeks on Friday after more protests at the removal of the British flag from Belfast City Hall. Masked youths clashed with police on the streets of east Belfast on an almost nightly basis for six weeks after local councilors voted to end a century-old tradition of flying the flag, enraging some pro-British loyalists. The worst violence had calmed in recent days and most demonstrations on Friday passed off without major incident. ...