The Lebanese government abruptly resigned Monday during a stormy parliamentary debate, prompting a tremendous roar from tens of thousands of anti-government protesters in central Beirut.

The demonstrators, awash in a sea of red, white and green Lebanese flags, had demanded the pro-Syrian government's resignation -- and the withdrawal of Syrian troops from Lebanon -- since this month's assassination of former Prime Minister Rafik Hariri.

Demonstrators in Beirut's Martyrs Square chanted, "Syria out! Syria out!" after Prime Minister Omar Karami announced his resignation in a speech aired by the Lebanese Broadcasting Corporation.

When Egyptians head to the polls later this year to elect a president, they will face something they have never seen before on the ballots: options.

In a surprise announcement Saturday, Egypt's long-ruling president, Hosni Mubarak, ordered constitutional changes that would open the door for the first-ever multiparty presidential elections in the world's most populous Arab country. The move is the latest indication of a cautious democratic shift under way in the Arab world.