CNN CNN Newsroom With Poppy Harlow May 16, 2015 19:31:00
Five days after eight people were killed in a horrific amtrak train derailment 21 people remain in the hospital some of them critically injured. today the federal railroad administration is demanding urgent changes. this afternoon it ordered amtrak to make several immediate modifications to its trains to prevent a similar tragedy. erin mclaughlin has the details. >> reporter: poppy, we're just hearing from the federal railroad administration that they are instructing amtrak to take a number of steps to improve safety along that very busy northeast corridor. it says that the following will be f...