Out of nuclear isolation, sees

Ties between India and the US are stronger than they have been in decades. Bilateral trade has surged, doubling since 2004 to more than $43 billion a year. Last year the two countries signed a landmark civil nuclear deal, agreed upon by Mr. Singh and former US President George Bush in 2005, that brought India out of nuclear isolation and symbolized a sea change in the countries' political relationship. Indeed, the US sees a vital role for India in the battle against terrorism in Pakistan and Afghanistan and in a host of other issues from world trade to climate change.

Please explain to me the emboldened parts.
I guess "out of nuclear isolation" means "India was the owner of the nuclear stuffs but now they agreed to share with each other"; but I don't have any idea what "sees" means in this context.