WASHINGTON, May 3 -- The John F. Kennedy Center for the Performing Arts issued the following news release: Three top-level area executives have joined the Kennedy Center's leadership team: Kimberly Cooper as Senior Vice President of Marketing, Matt Floca as Vice President of Facilities, and Frederick Owusu as Chief Human Resources Officer. Ms. Cooper and Mr. Floca joined the Center in January, and Mr. Owusu begins in his new position on May 6. Additionally, Aswathi "Ash" Zachariah, who has serv  more