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?