In the realm of live international radio broadcasts, Serry performed for audiences in both North and South America over CBS Radio. Several performances were enjoyed by Eleanor Roosevelt and South American diplomats during the opening ceremonies of Macy's Latin-American Fair of 1942 in New York City. In Europe, members of America's armed forces also enjoyed his artistry on the "Viva America" program which was broadcast over the Armed Forces Network during World War II every week By 1945 these performances were also broadcast by 114 stations affiliated with the CBS "La Cadena de las Americas" network and Voice of America for audiences in twenty Latin American nations in support of President Franklin Roosevelt's Good Neighbor Policy and Pan-Americanism.