Picture taken on April 11, 2011 shows Iran's biggest dimonimation currency 100000 Rials (8.9 U.S. dollars), with a portrait of Iran's late founder of Islamic Republic Ayatollah Ruhollah Khomeini, in Tehran. Iran plans to slash four zeroes from the national currency in "one or two years," seeking parity between its rial and the U.S. dollar, Central Bank Governor Mahmoud Bahmani has said. [Xinhua/AFP]