Page 49 - C 4 News Today : Breaking News, Live Updates & Top Stories | Vimarsana

That. but the investigation will proceed. they will look at the forensics at some of these recovered devices and they may be able to see the signature of the explosives, are they similar to the type of bombs used by say al qaeda or other groups. that may start to provide some answers. >> i heard you say earlier the fact these weren't big devices would perhaps suggest it isn't an al qaeda operation, that they would go for a more dramatic impact with the devices. also, there are these ball bearings we now know have been used. any significance to that? >> well, you know, piers, here in new york, ...

Finish line. back to you. >> thank you very much. >> terrible. >> meanwhile the fbi taking a lead in the boston bombing. the agency spent years creating a system for catching would be bombers before they can build a bomb. >> the fbi is focusing on examining the clues from the marathon route. this includes looking at all of the bags that were dropped as the runners and bystanders left the area. they are looking at surveillance video and cell phone video and on-line chatter and forensics from the explosive. no indication high powered explosives such as c-4 was used yesterday. reports indicate th...

The blast come. you see the metal expansions, they move as a result of the blast. you can also see that none of the runners are actually being hit. one guy falls down but there's some people next to the barriers there that are not even moving as we saw from the blast. which tells me that maybe there was a shaped charge. >> what do you mean? >> the ability to be able to direct the blast in a certain direction. so maybe the bomb was placed incorrectly and the bomb went up so only people that were within close distance of the bomb were severally injured. >> what would you normal licks pekt to see...

You need, but there are publications out there where a lot of cleaning solvents, cleaning liquids. you can go to home depot and pretty much create a bomb and the shrapnel. nails, screws, nuts, bolts, ball bearings, marbles. all these items are anti-personnel projectiles being sent into a low-level attack of people by the explosives. it doesn't have to be the type of explosives in an artillery shell or c-4 or even tnt. you just need an explosion where it creates any kind of propellant that sends the shrapnel out into a crowd. >> listening to what you are saying, mark, and i don't want to be pol...

Penske truck that tried to gain access to a restricted area. a federal law enforcement official told cnn that both bombs were small. and initial tests show no c-4 or other high-grade explosive material. suggesting the packages used in the attack were code devices. still >> there's a certain level of sophistication. having made these bombs before, it's not easy. you just can't get it on the internet, make two of these bombs go off fairly closely together. so somebody had some experience. somebody practiced. >> reporter: sourcesel cnn that one, possiy two, unexploded devices also were found. pot...