In this video, Anne Marie Slaughter explains why Twitter is a vital part of her work and how it is continually shaping the foreign policy landscape.

President Obama called Afghanistan "the good war." Now some lawmakers want to exit as quickly as possible.

At least 18 people are killed by a car bomb in the Karrada district of Baghdad on a day when bombings and shootings targeting Shi'ite Muslim pilgrims in Baghdad and police across Iraq kill at least 53 people.

Britain's Queen Elizabeth II holds a garden party at her country estate to mark the Diamond Jubilee.

Rare storm sweeps across the lagoon city of Venice.

Amateur video purports to show ongoing violence in Syria.

A spokesman for Kofi Annan says the international envoy to Syria wants powers to 'twist arms' over the ongoing violence in the country, which appears to be escalating.

President Vladimir Putin vowed on Tuesday not to let Russia be weakened by social shocks as tens of thousands of demonstrators gathered in Moscow to protest his historic third term.

The Obama administration said Tuesday that Russia is sending attack helicopters to Syrian President Bashar Assad's regime.

Jim Boulden explains why Spain's borrowing costs are up.

Robert King tells Anderson Cooper why Syria is not in a civil war but an ethnic cleansing.

The Israeli president speaks out on global issues.

Sen. John McCain, (R-Ariz.), sounds off on the actions of Syrian President Bashar Al-Assad.

Matthew Chance reports on the uncertainty in Greece surrounding the growing demand for austerity measures.