was detained and the other was killed. martha. martha: that man's story is emerging this morning and it is incredible. molly, with regard to the new york potential hit do the authorities think these suspects might have been able to pull it off? >> reporter: well there are thoughts are despite the immense police presence there and many, many cameras there is no way of telling that it wouldn't have happened. in fact very well might have. despite all of the things that are put in place to prevent something like this with no prior warning there is could have been death and destruction. they have no way of knowing whether it could have been prevented. martha? martha: pressure cooker bomb, the type used in boston and six pipe bombs they had with them no doubt could have done damage had they set them off. molly, thank you very much. we'll see you later. >> reporter: thank you. gregg: we're learning that 16 hours after investigators began interrogating dzhokhar tsarnaev, the suspect suddenly went silent. his interrogation was cut short when a magistrate