A police officer uses pepper spray on an Occupy Portland protestor at Pioneer Courthouse Square in Portland Ore., Nov. 17, 2011. (Randy L. Rasmussen/The Oregonian/AP Photo)

The silhouette of a Bahraini woman carrying a national flag is seen gesturing, during an anti-government rally, Nov. 18, 2011, in A’ali, Bahrain. Thousands of Shiite-led protesters calling for greater rights streamed into the area outside the capital of Manama in one of the largest demonstrations in weeks against the Gulf kingdom’s rulers. (Hasan Jamali/AP Photo)

Protesters light flares as they take to the streets to demonstrate against the new government of Italian Prime Minister Mario Monti, Nov. 17, 2011 in Rome, Italy. (Giorgio Cosulich/Getty Images)

Members of the National Guard sing Venezuela’s National Anthem during a ceremony in Caracas, Venezuela, Nov. 17, 2011. Venezuela’s President Hugo Chavez deployed more than 3,200 troops to the streets of Caracas as well as the surrounding states of Miranda and Vargas, according to Gen. Miguel Vivas Landino, urging them to help outgunned police curb widespread violent crime. (Ariana Cubillos/AP Photo)

A jogger runs during the autumn evening in Nashville, Tenn., Nov. 17, 2011. (Mark Humphrey/AP Photo)

Protesters hurl things at police, during a protest demanding education reform in Santiago, Chile, Nov. 18, 2011. (Luis Hidalgo/AP Photo)