21.   Last year police initially blocked the Orange march at Portadown before it reached the Catholic area, Garvaghy Road.

22.   Locals there earlier Thursday had vowed to prevent the Orange march by massing thousands on the road overnight.

23.   Many Catholics dread the sound of flutes and booming Lambeg drums, and see the Orange marches as sheer muscle-flexing by the majority community.

24.   Many Catholics resent the traditional Orange marches as provocative.

25.   More clashes over disputed Orange marches are expected Monday in the Catholic village of Bellaghy and next weekend in Belfast and Londonderry.

26.   Mulholland applies a similar logic to why many Catholics hate Orange marches.

27.   Nonetheless, Daugherty said he understood why Catholics disliked Orange marches.

28.   Orange marches often boil over into street violence.

29.   Police later saturated a Catholic enclave in south Belfast where locals have previously blocked Orange marches and were trying to protest against another march planned Friday.

30.   Protestant politicians accused the IRA of orchestrating the violence, and warned British authorities not to block any other Orange marches this week.