Smoke rises after coalition air strikes in Tripoli June 7, 2011. A huge explosion shook the area around Muammar Gaddafi's Bab al-Aziziya compound in central Tripoli on Tuesday, sending a column of grey smoke into the sky. [Photo/Agencies]

University students hold candles during a rally demanding tuition fee cuts, at the Cheonggye stream plaza in central Seoul, June 7, 2011. Hundreds of university students and supporting citizens continued to stage a rally demanding that South Korean President Lee Myung-bak fulfil his presidential election pledge to cut tuition fees by half, and provide solutions for youth unemployment. Signs read; "Halved tuition without conditions" (red letters) and "Carry out government-led tuition system" (white letters). [Photo/Agencies]