Prime Minister Dr. Manmohan Singh arrived in Washington to participate in the two-day Nuclear Security Summit beginning tomorrow. <br/><br/>The Summit aims to enhance international co-operation to prevent nuclear terrorism which US President Barack Obama has identified as the most immediate and extreme threat to global security. <br/><br/>42 nation and heads of European Union and International Atomic Energy Agency have been invited to participate in this Summit representing diverse set of regions and various levels of nuclear materials, energy and expertise. <br/><br/>The goals of the Nuclear Security Summit are to come to a common understanding of the threat posed by nuclear terrorism, to agree to effective measures to secure nuclear material and to prevent nuclear smuggling and terrorism.<br/><br/>Dr Manmohan Singh will meet Mr Obama in Washington tonight.<br/><br/>The Prime Minister will raise nuclear terrorism and situation in Pakistan during his meeting with President Obama. <br/><br/>Dr Singh will also discuss issues such as Afghanistan, G-20, economic recovery and maritime security with Mr Obama. <br/><br/>Official sources on board the Prime Minister’s special aircraft told AIR Special Correspondent that India has been a consistent advocate of a world free of nuclear weapons and will work with the United States and other countries attending the summit. <br/><br/>Official sources said that India is not for sanction against Iran and would be participating in the June 2010 meeting called by Iran.<br/><br/>On the civil nuclear liabilities bill, official sources said that it has been brought in for quick and effective compensation in case of accidents and there is no cap on liabilities. <br/><br/>On the reprocessing of spent fuel, official sources said that the reprocessing arrangement is an important milestone in the India-US partnership and reprocessing spent fuel will be done under IAEA safeguards. <br/>