The U.S will take part in deliberations over the U.N. Arms Trade Treaty (ATT) starting on March 18.
When the treaty was last debated--July 2012--the U.S. joined Russia, Indonesia, and India in saying they needed more time to think about it. Then, the very day after Obama was re-elected, "the U.S. Mission to the U.N. made clear its support for renewed ATT negotiations."
This treaty focuses on gun trafficking internationally, and is being sold as a treaty to limit the number of guns moving across borders.
However, as Breitbart News reported on July 21, 2012--if ratified by the U.S., this treaty would require some type of gun registration either domestically or internationally, or both.
How else would the treaty signatories know the origin of trafficked guns unless there is a database of all guns to which they can turn for verification?
As the NRA made clear when this treaty was debated in July: "Many of [its provisions] are incompatible with our Second Amendment rights."