Overview: Today we look back at 2011, a year that saw the U.S. killing of Osama Bin Laden, the ouster of a dictator in Egypt and the death of one in Libya, the meltdown of the Fukushima Daiichi nuclear plant in Japan, and the expansion of the secret U.S. drone war in Afghanistan, Pakistan and the Arabian Peninsula. As U.S. troops leave Iraq, thousands of private security contractors remain to guard the U.S. embassy—the largest in the world. The Horn of Africa was hit by the region’s worst drought in decades as the devastating impact of extreme weather was felt across the globe, while the world’s most powerful countries continue to refuse to join in a pact to address climate change. However, 2011 may be most remembered as a year of global uprisings. From the Arab Spring to Occupy Wall Street, millions of people took to the streets to oppose repressive regimes and an unjust economic system. We spend the hour today looking back at the protest movements that shaped 2011.