New York, Sept. 23 -- General Secretary of the Communist Party of Vietnam Central Committee and President To Lam, a high-level Vietnamese delegation and senior United Nations officials witnessed the exchange of cooperation documents between Vietnam and the UN in New York on September 22 afternoon (local time). The activity was part of the Vietnamese leader's working to attend the high-level general debate of the 81st session of the UN General Assembly and conduct bilateral activities in the US. At the ceremony, Minister of Finance Ngo Van Tuan and heads of three leading UN development agencies - UNDP Administrator Alexander de Croo, UNICEF Executive Director Catherine Russell, and UNFPA Executive Director Diene Keita - exchanged the Count...