Consider the following statements:
Statement 2 is correct. The North Atlantic Treaty Organization (NATO) was established on April 4, 1949, with the signing of the North Atlantic Treaty in Washington D.C. The United States of America and the United Kingdom were among the twelve original signatory states and thus founding members of this collective defence alliance.
Statement 1 is incorrect. The North Atlantic Cooperation Council (NACC) was established in 1991, after the Cold War, as a forum for dialogue and cooperation between NATO members and partner countries, particularly those from Central and Eastern Europe and the former Soviet Union. NACC did not replace NATO; rather, NATO continued to exist as a collective defence alliance. NACC itself evolved into the Euro-Atlantic Partnership Council (EAPC) in 1997, expanding its membership and scope of cooperation.
Based on the above, only Statement 2 is correct.