with president obama in the oval office. and over at the basilica of the ee mack lot conception on the grounds of the catholic university of america in d.c., construction crews, they are hard at work transforming the spot where the pope will celebrate his first mass in the u.s. before 25,000 people. they re painting curbs, trimming trees, even adding a cell phone tower for better service. the pope will also meet with president obama and address congress before leaving for new york and philadelphia. it was a nightmare for students on their way home from school near tampa on thursday. a school bus carrying 27 elementary school students careened into a shallow pond and overturned. people who witnessed the crash rushed to help rescue the kids and fortunately there were no reports of serious injuries. authorities say it s still unclear, though, what caused the bus to run off the road. but one student did tell nbc affiliate wfla it looked like the driver could not get the brakes to work.