Brazilian singer Claudia Leitte, right, US singer Jennifer Lopez and rapper Pitbull perform during the opening ceremony ahead of the group A World Cup soccer match between Brazil and Croatia, the opening game of the tournament, in the Itaquerao Stadium in Sao Paulo, Brazil, Thursday, June 12, 2014. (AP Photo/Shuji Kajiyama)

Photos: 2014 FIFA World Cup

The 2014 FIFA World Cup kicked off Thursday with an opening ceremony in Sao Paulo, Brazil. The host country, Brazil, opened the tournament a…

Facebook CEO Mark Zuckerberg gestures while delivering the keynote address at the f8 Facebook Developer Conference Wednesday, April 30, 2014, in San Francisco. (AP Photo/Ben Margot)

Iran judge summons Facebook CEO to court

TEHRAN, Iran (AP) — A judge in southern Iran has ordered Facebook founder and CEO Mark Zuckerberg to appear court to answer complaints by in…