Zambian president sworn in amid ballot rigging claims

Levy Mwanawasa has been sworn in as Zambian president, capping a hotly contested election marred by street riots sparked by opposition allegations that the ruling party rigged the vote.

Mwanawasa, 53, the hand-picked successor of the outgoing president, said in his inaugural address that he would not tolerate further unrest in this normally peaceful southern African country.