US President Barack Obama discussed with Prime Minister Manmohan Singh the situation in Afghanistan ahead of unveiling his new Af-Pak policy. Obama telephoned Dr Singh close on the heels of the two leaders' meeting in Washington during which the Afghan issue was discussed prominently. The Prime Minister's Office said in New Delhi that the two leaders, during their brief conversation, discussed ways to bring peace and stability in Afghanistan, apart from the next week's climate change summit in Copenhagen. During his meeting with Obama in Washington last week, Dr Singh said it is important for all major regional and international players to put their weight behind the Afghan government. The US President, in his new Af-Pak policy, is expected to announce deployment of up to 35,000 more troops to fight a resurgent Taliban, Al-Qaeda and to secure Afghan cities, along with additional civilian aid. Obama had highlighted the importance of tackling violence and extremism emanating from the region in a serious way. India feels that due to the continued threat posed by terrorism emanating from Afghanistan, the world community should stay engaged there and not think about premature exit as it could embolden terrorists.On the climate change issue, the Prime Minister told Obama that India would play a constructive role in the negotiations and looked forward to a successful outcome in Copenhagen. India has also made it clear that it is not in a position to take legally binding emission cuts but has already embarked on an enhanced energy efficiency mission which could reduce the carbon intensity of its rapid growth.