Please answer a question about the following article about Miami:

Miami is partitioned into many different sections, roughly into North, South, West and Downtown. The heart of the city is Downtown Miami and is technically on the eastern side of the city. This area includes Brickell, Virginia Key, Watson Island, and PortMiami. Downtown is South Florida's central business district, and Florida's largest and most influential central business district. Downtown has the largest concentration of international banks in the U.S. along Brickell Avenue. Downtown is home to many major banks, courthouses, financial headquarters, cultural and tourist attractions, schools, parks and a large residential population. East of Downtown, across Biscayne Bay is South Beach. Just northwest of Downtown, is the Civic Center, which is Miami's center for hospitals, research institutes and biotechnology with hospitals such as Jackson Memorial Hospital, Miami VA Hospital, and the University of Miami's Leonard M. Miller School of Medicine.

On what street is the highest concentration of international banks in the US?
Brickell Avenue