August 23, 2017 By Keyvan Salami Iran can enrich uranium within five days if the U.S . imposes more sanctions on Iran, Ali Akbar Salehi, Iran's atomic agency head, warned this week. He claimed that Iran could achieve 20% enriched uranium in five days – a level at which it could then quickly be processed further into weapons-grade nuclear material. Last week, Iranian president Hassan Rouhani announced that Iran could abandon its nuclear agreement with world powers " within hours " if the United States imposes any more new sanctions. "If America wants to go back to the experience of imposing sanctions, Iran would certainly return in a short time – not a week or a month, but within hours - to conditions more advanced than before the start of negotiations," Rouhani told a session of parliament broadcast live on state television. In response, U.N. ambassador Nikki Haley said Iran should not be allowed "...