Forensic Bomb News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Those statements in contradiction to egyptian statements. what are investigators looking for? kyung lah is "outfront." >> reporter: the power of a bomb aboard a passenger plane. this demonstration by the u.s. attorney's office shows the end result. >> coming through the office. >> reporter: the beginning tracked by forensic bomb expert thomas anthony. >> is this a classic c-4 explosion? >> it is. less push and more force. we have less residue than a low explosive. >> reporter: starting with a c-4 bomb, he walks us through the impact of several types of bombs and the telltale signs they believe...

This device and, fourth, what did the network do to get this on the aircraft. these guys cannot stay here because they will target another aircraft. >> thank you very much, phil mudd. you said they will target another aircraft. next, we'll go inside a bomb lab to show you what investigators are looking at right now and whether they can figure out what sort of a bomb this might have been sfoo plu. plus, egypt is saying there's still no evidence to support that there was a bomb. (vo) what does the world run on? it runs on optimism. it's what sparks ideas. moves the world forward. invest with...

Of russian metrojet 9268, isis is claiming responsibility for killing the 224 people on board. in a new audio message, reportedly from the sinai branch, the militant group says find your black boxes and analyze them. we are the ones with god's blessing who brought it down. today, russian and egyptian officials insisting there's currently no evidence of a bomb. but u.s. officials say their intelligence is pointing to a bomb, possibly by one of isis' least known affiliates. >> it has proved itself as a lethal, very sophisticated and very powerful terrorist organization over the past specifically...

Video. they are marking the plane with what looks like some sort of a sophisticated magic marker. what are they doing there. >> you have to know where to look with this residue. to do that, you have to look for what is the initial fracture point in the fuselage. what they are doing there is looking at the metallergy, which way it's pointing. if it's from a bomb or any kind of internal pressure change, it's going to push that metal in certain ways and as it breaks, it makes a little indication. doing in the investigation, we - make arrows pointing to where that fracture point is leading us, whe...

Throw off someone who you know is listening on your communications. >> reporter: isis in the sinai peninsula has shown bomb-making signals before and if isis is responsible for this, it would mark a significant step in their capabilities to launch further attacks. >> at this point, we don't have enough information to make our own determination about what exactly occurred but we do have enough information at this point to not rule out the possibility of terrorism. >> reporter: there is no indication so far that passengers or crew aboard the flight had any connection to terror groups so investig...