Su Tseng-chang, chairman of Taiwan's main opposition Democratic Progressive Party (DPP), listens during an anti-nuclear press conference in Newe Taipei City on January 21, 2013. The party said on January 21 that they have collected more than 30,000 signatures for a referendum petition aimed to deter commercial operation of the island's fourth nuclear power plant in the north, alleging that the half-completed plant is unsafe and its operation might endanger Taiwan. AFP PHOTO / Mandy CHENG        (Photo credit should read Mandy Cheng/AFP via Getty Images)