Barometric Pressure Switch News Today : Breaking News, Live Updates & Top Stories | Vimarsana

The cell phone timer boards to potentially initiate those devices. i worked an investigation back in the late '90s where a serial bomber out in fremont, california, used a timex watch that had a year capability. he basically planted his bomb a year out and had it set to go on anniversary. >> what about barometric pressure because we know the plane was at 30,000 feet. >> that's another possibility and probably a strong possibility. it reached 31,000 feet. if i were to build a device, i would want some certainty into it. and outside of command control of the device, a barometric pressure switch ...

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...

Explosives used by al qaeda. authorities believe isis used a more conventional device. a source celling cnn it may have included a barometric pressure switch. al qaeda has targeted passenger planes four times since 2011. one attempt foiled by passengers on board. a plot by british extremists who hide explosives in water bottles was disrupted. and then the underwear bomber failed to properly detonate explosives as his plane was landing in detroit. a year later, explosives were discovered in two printer toner cartridges on usp planes. and a master bomber claimed credit for both incidents.

Board. if true, it would be the most significant terror attack since 9/11. the first time after several failed attempt they were able to blow up a passenger jet in flight. two government sources say terrorist chatter indicates that a bomb took down the plane. u.s. officials also say they suspect the bomb was planted in luggage by someone at the airport. so what set the bomb off? one possibility intelligence agents are looking at is that it was triggered by a barometric pressure switch, set to go off at a certain altitude. we are covering the story from every angle around the world tonight. bar...

Bear bear. paul, i mean, we've talked a lot about groups and saw it there trying to use sophisticated methods, the ink jet cartridge. they say that's a relatively easy thing to make. >> a very conventional device, meat and potatoes. the crucial factor here may be they recruited an insider at the airport and if you can do that, that's the holy grail for terrorist groups because you can insinuate a bomb. they haven't apprehended the potential insider who may have got this bomb on to that get. >> bob, i mean, again, a bomb with the barometric pressure switch, are they easy to make? it's a worryin...