Unrest and accusations of police brutality in Brazil’s slums have threatened Rio’s security—and the country’s image—as it comes under a global spotlight with the World Cup, says expert Janice Perlman.

President Obama’s announced reforms should help restore public confidence in some controversial U.S. surveillance practices, says expert Andrew Weissmann.

The United States should cripple the Syrian government’s ability to kill masses of its own people and openly intensify its support to opposition forces, says expert Frederic C. Hof.

While the Foreign Intelligence Surveillance Court has granted U.S. agencies broad legal authority to collect sensitive information, it is hardly a "rubber stamp" for government surveillance requests,…

The International AIDS Conference shows that challenges, such as funding and maintaining political will, likely means no short-term end to the epidemic, says CFR’s Laurie Garrett.