Tense France chooses new president, deciding Europe's fate

Election campaign posters for French centrist presidential candidate Emmanuel Macron and far-right candidate Marine Le Pen are displayed in front of the polling station where Marine Le Pen will vote in Henin Beaumont, northern France, Saturday, May 6, 2017. Voting for France's next president starts in overseas territories and French embassies abroad, as a blackout on campaigning descends so that voters can reflect on whether to entrust their country's future to independent Emmanuel Macron or far-right populist Marine Le Pen. (AP Photo/Francois Mori) (The Associated Press)

French independent centrist presidential candidate, Emmanuel Macron, center, and his wife Brigitte, right, walk in a street of Le Touquet, northern France, Saturday, May 6, 2017. Voting for France's next president has started in some overseas territories one day before voters in the mainland cast their ballots in Sunday's runoff between independent centrist Emmanuel Macron and far-right leader Marine Le Pen. (AP Photo/Thibault Camus) (The Associated Press)

An official holds a voter registration card as people queue to cast their ballots in the presidential runoff election between Emmanuel Macron and Marine Le Pen, in Marseille, France, Sunday, May 7, 2017. Voters across France are choosing a new president in an unusually tense and important election that could decide Europe's future, making a stark choice between pro-business progressive candidate Emmanuel Macron and far-right populist Marine Le Pen. (AP Photo/Claude Paris) (The Associated Press)

Voters across France are casting ballots in a presidential election runoff that could decide Europe's future, choosing between independent Emmanuel Macron and far-right populist Marine Le Pen.

With Macron the pollsters' favorite, voting stations opened across mainland France at 8 a.m. (0600 GMT) under the watch of 50,000 security forces guarding against extremist attacks. Polling agency projections and initial official results will be available when the final stations close at 8 p.m. (1800 GMT).

The unusually tense and unpredictable French presidential campaign ended with a hacking attack and document leak targeting Macron on Friday night. France's government cybersecurity agency is investigating the hack.

Either candidate would lead France into uncharted territory, since neither comes from the mainstream parties that dominate parliament and have run the country for decades.