A protester hurls a canister during clashes in Rome, Saturday, Oct. 15, 2011. (AP Photo/Gregorio Borgia)
Russian police officers detain an opposition activist during a protest against vote rigging in St. Petersburg, Russia, Sunday, Dec. 4, 2011.(AP Photo/Dmitry Lovetsky)
An Egyptian shouts slogans as he demands the end of Egypt's ruling military council at Tahrir Square, in Cairo, Egypt, Sunday, Nov. 6, 2011 during the first day of Islamic Eid al-Adha, or Feast of the Sacrifice. (AP Photo/Amr Nabil)
In this Nov. 2, 2011 photo, Occupy Wall Street protestors stand on top of a parked semi truck during a march from downtown Oakland, Calif., to the port of Oakland. (AP Photo/Jeff Chiu)
Protesters chant slogans and wave the Egyptian national flag as they gather in Tahrir Square, the focal point of the Egyptian uprising, Friday, July 15, 2011, in Cairo, Egypt.(AP Photo/Maya Alleruzzo)
Demonstrators protesting against corporations march on Wall Street amid heavy police presence, Tuesday, Sept. 20, 2011, in the Manhattan borough of New York. (AP Photo/John Minchillo)
A riot policeman strikes a demonstrator trying to prevent deputies from reaching the Greek parliament in central Athens on Wednesday, June 29, 2011. (AP Photo/Thanassis Stavrakis)
Protesters yell outside Wisconsin Gov. Scott Walker offivce after a ceremonial bill signing ceremony Friday, March 11, 2011, in Madison, Wis. (AP Photo/Morry Gash)
Protesters shout slogans during a demonstration in front of the RCD party headquarters, in Tunis, Thursday, Jan. 20. 2011. (AP Photo/Christophe Ena)
