The New York Times is reporting the US is preparing to accuse Iran of building a secret underground facility to produce nuclear fuel. President Obama will reportedly make the announcement at the G-20 summit in Pittsburgh later today. The alleged site is not yet operational. The Obama administration says it decided to make the allegations public after discovering Iran was aware Western intelligence agencies had monitored the site. Earlier today, European officials said Iran notified the International Atomic Energy Agency of a previously undisclosed uranium enrichment plant earlier this week.