The Last Remaining Nuclear Arms Treaty Between the United States and Russia May Soon Expire

A 2011 agreement known as the New Strategic Arms Reduction Treaty, or New START, is the last remaining nuclear arms control treaty between the United States and Russia. The treaty imposes limits on the size and composition of the nuclear arsenals of the world's two largest nuclear powers. And it allows Russia and the United States to inspect each others nuclear arsenals to ensure compliance.

New START is now the only nuclear arms reduction treaty between the United States and Russia.

Last year the Trump administration withdrew from a Ronald Reagan era agreement called the Intermediate-Range Nuclear Forces Treaty, or INF, that eliminated a certain class of nuclear weapons.

But even though it's the only nuclear treaty between the U.S. and Russia, New START may not last much longer. The treaty officially expires in February 2021. So far, it is unclear whether or not the Trump administration will seek its extension. Russia has already signaled that it would extend the agreement another five …