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Night vision goggles are displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209568 )

Belgian rifles are displayed at the Defence and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209455 )

A peace protestor's banner hangs outside the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209343 )

A peace protestor stands outside the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209339 )

Protestors use pop up tents to make a peace camp outside the Defense and Security Exhibition on September 10, 2013 in London, England. ExCeL London is hosting the exhibition with hundreds of manufacturers from all over the world displaying their hardware. (Photo by Peter Macdiarmid/Getty Images) ( 180209340 )

A visitor to the Defense and Security Exhibition looks at a counter mine vehicle on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209341 )

Naval vessels line the quayside at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209345 )

A public order 'moral effect' grenade is displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209363 )

Nightvision eyewear is displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. The arms fair describes it self as the world's largest fully integrated defence and security exhibition. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747720 )

Body armor is displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209364 )

A Supacat military vehicle is shown at the Defence and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209365 )

Glock pistols are displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209367 )

Weapons are displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209392 )

Serbian military hardware is displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209454 )

Sailors from the German Navy try out weapons at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209457 )

Serbian military hardware is displayed at the Defence and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209458 )

Rifles are displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209565 )

Visitors walk past amphibious vehicles displayed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209673 )

The Lockheed Martin stand at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209674 )

A man demonstrates a metal detector at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209675 )

Visitors walk past military vehicles displayed at the Defence and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209676 )

Senior Omani military personnel look at equipment on the BAE Systems stand at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209692 )

Airbus airplanes are shown in model form at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209823 )

Dutch naval vessel HNLMS Groningen is berthed at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209826 )

Visitors look at equipment on the BAE Systems stand at the Defense and Security Exhibition on September 10, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 180209829 )

A man looks at tank ammunition at the Defence and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747236 )

Weapons are displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALLBEN ( 522747426 )

Weaponry is displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747445 )

Weapons are displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747486 )

Weapons are displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747554 )

Nightvision eyewear is displayed at the Defence and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747620 )

Weapons are exhibited at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747682 )

Weapons are displayed at the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522747789 )

A protester carries a poster during a demonstration against the Defense and Security Equipment International (DSEI) arms fair at the ExCeL centre in east London, on September 10, 2013. AFP PHOTO / BEN STANSALL/AFP/Getty Images ( 522748004 )