Here are 1.7 metric tons of radioactive material that won't find their way into dirty bombs detonated in New York City. From the [1] BBC, with thanks to Richard:

Along with 1.77 tons of enriched uranium, about 1,000 "highly radioactive sources" were also removed.

The material was taken from a former nuclear research facility on 23 June, after being packaged by 20 experts from the US Energy Department's secret laboratories.

It was flown out of the country aboard a military plane in a joint operation with the Department of Defense, and is being stored temporarily at a Department of Energy facility.