4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - Monks undergo training at a Tibetan temple in Xiahe County in Gannan Tibetan Autonomous Prefecture of China's Gansu Province on March 12, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - A portrait of the Tibetan spiritual leader in exile, the Dalai Lama, is displayed at a Tibetan temple in China's Qinghai Province on March 10, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - A plainclothes public safety officer (L) holding a video camera looks at a reporter at a Tibetan temple in Huangnan Tibetan Autonomous Prefecture of China's Qinghai Province on March 11, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - A police officer (R) patrols a Tibetan residential area in Chengdu, Sichuan Province, on March 13, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - Police officers (L) patrol a Tibetan temple in Huangnan Tibetan Autonomous Prefecture of China's Qinghai Province on March 11, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

4 years after Tibet rioting

4 years after Tibet rioting

BEIJING, China - Woman gather at a Tibetan temple in Huangnan Tibetan Autonomous Prefecture of China's Qinghai Province on March 11, 2012, just ahead of the anniversary of the March 14, 2008 rioting in Lhasa in China's Tibet Autonomous Region.

Fukushima nuke plant's No. 3 reactor

Fukushima nuke plant's No. 3 reactor

TOKYO, Japan - This October 2008 file photo shows the No. 3 reactor (indicated by an arrow) of Fukushima No. 1 nuclear plant in Fukushima Prefecture. The Japanese government said a hydrogen explosion occurred at the reactor on March 14, 2011, following an explosion at the No. 1 reactor at the same plant the previous day. The plant has been shut down since the March 11 mega quake.