Obama, Medvedev sign treaty to shrink nuclear arsenal

PRAGUE — US President Barack Obama and Russian President Dmitry Medvedev have signed a milestone treaty to cut both countries' warhead arsenals by nearly a third.
Immediately following the signing ceremony in Prague on Thursday, Obama called the arms treaty an important milestone for nuclear security and US-Russian relations.
The pact between the two former Cold War foes would shrink those arsenals to 1,550 warheads over seven years. That's about about a third less than the 2,200 currently permitted.