Radio in the second quarter solidified its status as the nation's top national platform, Nielsen is reporting. Radio set a record for its national audience in a given week, with some 245 million listeners age 12 or older tuning in. Radio also set highs for its reach among African-Americans and Hispanic Americans. "As we are faced with an ever-expanding list of media options, radio maintains its place as a significant part of the listening experience," Nielsen writes. Inside Radio (subscription required)