to the passage below and then answer the question afterwards in the same language as the passage: Passage: In April 2009, reports surfaced that North Korea has become a "fully fledged nuclear power", an opinion shared by International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei. On May 25, 2009, North Korea conducted a second nuclear test, resulting in an explosion estimated to be between 2 and 7 kilotons. The 2009 test, like the 2006 test, is believed to have occurred at Mantapsan, Kilju County, in the north-eastern part of North Korea. This was found by an earthquake occurring at the test site.In February 2012, North Korea announced that it would enrich uranium at the Yongbyon Nuclear Scientific Research Center and not conduct any further tests of nuclear weapons while productive negotiations involving the United States. In April 2012, North Korea announced that it would proceed with uranium enrichment at the Yongbyon Nuclear Scientific Research Center and not conduct any further ground tests of nuclear weapons while productive negotiations involving the United States.
Mantapsan, Ìpínlẹ̀ Kilju