Congress has marked its 131st Foundation Day with party President Sonia Gandhi hoisting the party flag at the AICC headquarters in New Delhi today. All the top leaders of the party including Congress Vice-President Rahul Gandhi, former Prime Minister Dr. Manmohan Singh, leaders Salman Khurshid, Anand Sharma, Sheila Dikshit, Ghulam Nabi Azad and Manish Tewari were present on the occasion.<br/><br/>After the flag hoisting at Akbar Road party office, Mrs. Sonia Gandhi and Rahul Gandhi interacted with the leaders. A large number of supporters also gathered on the occasion.