A protester sprays a message on a government building Wednesday as students protest against tuition fees at Whitehall in London. Thousands of British students participated in the demonstration. (Associated Press)

South Korean soldiers carry an injured man upon arrival from the island of Yeonpyeong at a military port in Incheon, west of Seoul, South Korea, Wednesday, Nov. 24, 2010. South Korea's troops were on high alert Wednesday as their government exchanged threats with rival North Korea following a frightening military skirmish that ratcheted tensions on the peninsula to new extremes. (AP Photo/ Lee Jin-man)

A South Korean resident stands on the rubble of a destroyed house on Yeonpyeong island, South Korea, Wednesday, Nov. 24, 2010. South Korea found the burned bodies Wednesday of two islanders killed in a North Korean artillery attack, marking the first civilian deaths in the incident and dramatically escalating the tensions in the region's latest crisis. (AP Photo/Yonhap)

Destroyed houses are seen on South Korea's Yeonpyeong Island on Wednesday, Nov. 24, 2010. South Korea found the burned bodies of two islanders killed in a North Korean artillery attack, marking the first civilian deaths in the incident and dramatically escalating the tensions in the region's latest crisis. (AP Photo/Yonhap, Kim Hyun-tae)

An unidentified family member of Seo Jeong-woo, a South Korean Marine who was killed on South Korean Yeonpyeong Island by North Korea's artillery attack, weeps during a memorial service at a military hospital in Seongnam, South Korea, Wednesday, Nov. 24, 2010. South Korea said Wednesday the burned bodies of two male civilians found on the island, marking the first civilian deaths in the incident. (AP Photo/Yonhap, Shin Young-gun)

South Korean survivors arrive as they are surrounded by relatives and media at a port in Incheon, west of Seoul, South Korea, Wednesday, Nov. 24, 2010. South Korea's troops were on high alert Wednesday as their government exchanged threats with rival North Korea following a frightening military skirmish that ratcheted tensions on the peninsula to new extremes. (AP Photo/ Lee Jin-man)

South Korean coast guard help people to disembark from a ship at a port in Incheon, South Korea after they were evacuated from Yeonpyeong Island, Wednesday, Nov. 24, 2010. South Korea's troops were on high alert Wednesday as their government exchanged threats with rival North Korea following a frightening military skirmish that ratcheted tensions on the peninsula to new extremes. (AP Photo/David Guttenfelder)

Protesters denounce North Korea in front of the Defense Ministry, Wednesday, Nov. 24, 2010 in Seoul, South Korea. South Korea's troops were on high alert Wednesday as their government exchanged threats with rival North Korea following a frightening military skirmish that ratcheted tensions on the peninsula to new extremes. (AP Photo/Wally Santana)

South Korean Marines who injured on South Korean Yeonpyeong Island after being hit by North Korea's attack, sit on beds at a military hospital in Seongnam, South Korea, Wednesday, Nov. 24, 2010. South Korea found the burned bodies Wednesday of two islanders killed in a North Korean artillery attack, marking the first civilian deaths in the incident and dramatically escalating the tensions in the region's latest crisis. (AP Photo/Yonhap)