Obama to host leaders of Vietnam, Greece at White House WASHINGTON, July 11 (Xinhua) -- U.S. President Barack Obama will host Vietnamese President Truong Tan Sang and Greek Prime Minister Antonis Samaras at the White House separately in July and August to discuss a range of issues of common interest, the White House said on Thursday. In their meeting slated for July 25, Obama and Truong Tan Sang will discuss "how to further strengthen our partnership on regional strategic issues and enhance our cooperation with ASEAN (Association of Southeast Asian Nations)," White House spokesman Jay Carney said in a statement. "The president also looks forward to discussing human rights, emerging challenges such as climate change, and the importance of completing a high standard Trans-Pacific Partnership (TPP) agreement," Carney noted. The TPP negotiations involve 11 countries on either side of the Pacific. If the talks conclude successfully as expected before the Asia-Pacific Economic Cooperation summit begins in October, the largest free trade zone will be created in the world. Obama's meeting with Samaras on Aug. 8 will focus on U.S. support for Greece's efforts to reform and remedy its economy. In addition, Obama looks forward to discussing with the prime minister "a broad array of mutual interests and challenges," including defense cooperation, the Transatlantic Trade and Investment Partnership (TTIP), regional cooperation, mutual counterterrorism efforts, prospects for a settlement in Cyprus as well as the developments in North Africa and Syria, Carney said. The United States and the European Union kicked off their first round of TTIP negotiations on Monday in Washington D.C.