the kids, they have laptops, they can do their home work, they can e-mail each other, all that fun stuff. martha: one -- one mom is not convinced. >> reporter: keeps them out of trouble. martha: that can be helpful. laptops are taking over children's lives. taking over their lives. bill: that would have kept me out of trouble. i was the one in the back, free shoes no the bus driver. that was good. there's a commuter train crash, it killed nine people, injured more than 80 others. it was the worst crash in d.c. metro system history. now the feds, holding a rare public hearing today to make sure it doesn't happen again in any american city. we're on that. martha: all right, here is a question for you folks. is acorn's shell cracking? months after an undercover video scandal rocked this controversial activist group, why are they deciding to shut down the big umbrella over acorn?