CNN CNN Newsroom April 21, 2013 23:10:00
The capital of dagestan in december 2012. just months after tsarnaev was in the same region, same city, visiting his family. so he was there at the same time, but it is not known precisely if these two men could have come into contact with each other. it raises an intriguing line of investigation. don? >> all right. what do we know about his time in russia, phil? >> reporter: very little at the moment. we know there was a six-month period between when he flew out, when he flew in and when he flew out, sorry, in the first half of last year. as i say, we do not know if he came specifically into ...