Miami International Airport and PortMiami are among the nation's busiest ports of entry, especially for cargo from South America and the Caribbean. The Port of Miami is the world's busiest cruise port, and MIA is the busiest airport in Florida, and the largest gateway between the United States and Latin America. Additionally, the city has the largest concentration of international banks in the country, primarily along Brickell Avenue in Brickell, Miami's financial district. Due to its strength in international business, finance and trade, many international banks have offices in Downtown such as Espírito Santo Financial Group, which has its U.S. headquarters in Miami. Miami was also the host city of the 2003 Free Trade Area of the Americas negotiations, and is one of the leading candidates to become the trading bloc's headquarters.