More than 2,000 people waited six hours Saturday at the NBC Tower in Chicago for open casting calls for reality producer Mark Burnett's fourth and fifth installments of "The Apprentice." Donald Trump will continue to lead the boardroom deliberations in the fourth go-round, while the fifth edition will feature Martha Stewart. One applicant in a mink coat had her chauffeur and limo wait curbside for five hours as she took warm-up breaks in the car while keeping her place in line. Other business-minded spirits used the 27-degree temps to sell everything from blankets ($10) to copies of the casting questions used for the last visit to Chicago ($5.)