<p>Fears of a new Lockerbie-style bombing have increased after it emerged that one of the two bombs posted from Yemen was carried aboard two passenger planes before being seized in Dubai.<br /><br />A bomb hidden in a suitcase on a Pan Am jet killed 270 people Dec 21, 1988, when it exploded over the Scottish village called Lockerbie.<br /><br />US President Barack Obama's deputy national security adviser John Brennan said all nations had to fear the worst.<br /><br />"We have to presume there are more mail bombs on the way. It would be very imprudent to assume there are no others," he was quoted as saying by The Mirror.<br /><br />The explosive device was on a Qatar Airbus A320 from Yemen's capital Sanaa to Doha and from there it was transferred on to another Qatar Airways plane.<br /><br />The second bomb was removed by bomb disposal experts at Britain's East Midlands airport. <br /><br />The bomb was not due to explode for several more hours - when the aircraft would be over US cities.<br /><br />A report said that devices, hidden in printer ink cartridges, were to be detonated by timers rather than mobile phones, which cannot receive a signal above 2,000 feet.<br /><br />This means that instead of waiting until a plane is over the US, bombs could be timed to explode over European cities. And because it is a huge hub for international air freight, Britain faces the highest risk of attack.<br /><br />One counter-terror official said: "It would appear Al Qaeda went for the jackpot this time, striking at America's heartland, and missed."<br /><br />"The terrorists have tried repeated so-called dry runs. Next time they may lower their sights and simply detonate at the earliest opportunity. And that presents the spectre of Lockerbie on Britain all over again."</p>
<p>Fears of a new Lockerbie-style bombing have increased after it emerged that one of the two bombs posted from Yemen was carried aboard two passenger planes before being seized in Dubai.<br /><br />A bomb hidden in a suitcase on a Pan Am jet killed 270 people Dec 21, 1988, when it exploded over the Scottish village called Lockerbie.<br /><br />US President Barack Obama's deputy national security adviser John Brennan said all nations had to fear the worst.<br /><br />"We have to presume there are more mail bombs on the way. It would be very imprudent to assume there are no others," he was quoted as saying by The Mirror.<br /><br />The explosive device was on a Qatar Airbus A320 from Yemen's capital Sanaa to Doha and from there it was transferred on to another Qatar Airways plane.<br /><br />The second bomb was removed by bomb disposal experts at Britain's East Midlands airport. <br /><br />The bomb was not due to explode for several more hours - when the aircraft would be over US cities.<br /><br />A report said that devices, hidden in printer ink cartridges, were to be detonated by timers rather than mobile phones, which cannot receive a signal above 2,000 feet.<br /><br />This means that instead of waiting until a plane is over the US, bombs could be timed to explode over European cities. And because it is a huge hub for international air freight, Britain faces the highest risk of attack.<br /><br />One counter-terror official said: "It would appear Al Qaeda went for the jackpot this time, striking at America's heartland, and missed."<br /><br />"The terrorists have tried repeated so-called dry runs. Next time they may lower their sights and simply detonate at the earliest opportunity. And that presents the spectre of Lockerbie on Britain all over again."</p>