Iran will shift its production of higher grade uranium to an underground bunker and triple its production capacity, it said on Wednesday in a defiant response to accusations it is trying to produce atomic bombs. "This year, under the supervision of the (International Atomic Energy) Agency, we will transfer 20 percent enrichment from the Natanz site to the Fordow site and we will increase the production capacity by three times," the head of Iran's atomic energy agency, Fereydoun Abbasi-Davani, told reporters after a cabinet meeting, the state broadcaster IRIB reported. Iran only disclosed the existence of the Fordow site, in...