MOSCOW, Russia (CNN) - U.S. President Barack Obama and Russian President Dmitry Medvedev signed a "joint understanding" Monday committing the United States and Russia to a new, legally binding arms-control treaty, according to a statement released by the White House.
The treaty will limit the number of nuclear warheads each side can deploy and the number of missiles they have to launch them.
It is designed to replace the Start I agreement, which is nearly two decades old and expires December 5.
The two countries will "conduct a joint review of the entire spectrum of means at our disposal that allow us to cooperate on monitoring the development of missile programs around the world," Obama and Medvedev said in a joint statement.
Citing the dangers of ballistic missile proliferation, the two leaders called "upon all countries having a missile potential to refrain from steps that could lead to missile proliferation and undermine regional and global stability."
Among other things, Obama and Medvedev also concluded an agreement allowing U.S. military supplies to be transported through Russia for the purpose of supplying American troops in Afghanistan.
- agreed to jointly work toward accounting for their missing military personnel from World War II, the Korean War, the Vietnam War and the Cold War, including Soviet military personnel unaccounted for in Afghanistan;
- concluded a plan for resuming military-to-military cooperation;
- agreed to create a new commission "to provide better structure to the bilateral relationship" between Russia and the United States; and
- agreed to a memorandum designed to boost cooperation in the fields of medicine and public health.