[Solved] In 2009, where did U2 set a record for highest U.S. concert attendance?

The Quiz: In 2009, where did U2 set a record for highest U.S. concert attendance?

Rose Bowl, Pasadena
Hard Rock Stadium, Miami
Hersheypark Stadium, Hershey
Nationals Park, D.C.

The correct answer to this quiz is Rose Bowl, Pasadena.