Massive security forces will guard Chelsea Clinton’s wedding to Marc Mezvinsky this weekend. The FBI is rolling into Rhinebeck, N.Y. where state police are to patrol, the main road will close, and the FAA has designated a no-fly zone. Security was already tight Thursday amid preparations at the New York estate. Local businesses remain tight-lipped about their role in the "Wedding of the Year," which is sometimes upgraded to the "Wedding of the Century." Former President Bill Clinton and Secretary of State Hillary Clinton will naturally be in attendance and the stellar, 500-person guest list includes celebrities like Oprah Winfrey.