On Thursday, France directly accused Iran of secretly developing atomic weapons, a charge Iran denied.

NPR: Iran, Russia Prepare for Talks on Nuclear Fuel

U.S. officials and their allies accuse Iran of operating an illicit nuclear enrichment program to develop atomic weapons, a charge Iran denies.

WSJ: U.S. Team Behind Computer Worm That Hit Iran

The West fears that Iran is using its nuclear drive to try to build atomic weapons, a charge Tehran has consistently denied, saying it is aimed at generating electricity.

CENTERFORSECURITYPOLICY: Tehran threat in the US' backyard

It is defined by gravity because that is the only way that it interacts it has no electric charge, and does not feel the strong and weak forces that bind atomic nuclei together.

ECONOMIST: Research from the beginning of time