The discovery of a plant for making potentially weapons-usable uranium, dug secretly into a mountain on a military compound near the city of Qom, means that the test of their sincerity is Iran.

This month, the United States, Russia and the IAEA worked to return highly-enriched uranium from Uzbekistan to a nuclear facility in the Russian city of Dmitrovgrad.

The investigation results on natural uranium concentrations in drinking water sources, Hei River and Ba River, in Xi 'an City are presented in this paper.