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  TimesPeople recommended a blog post:

  Oct 23, 2011

  Israel Doesn't Use Scanners - Room for Debate

  Israel has a security approach that focuses on threats and vulnerabilities, not body scanners.

There are examples of Japanese mercenary attacks at the behest of the Palestinians.
http://en.wikipedia.org/wiki/Lod_Airport_massacre
http://www.nytimes.com/2000/03/17/world/fate-of-5-terrorists-hangs-between-japan-and-lebanon.html?pagewanted=1
http://en.wikipedia.org/wiki/Japanese_Red_Army#Activities

• March 31, 1970: Nine members of the JRA's predecessor, the Red Army Faction (whose leaders had been a part, but were thrown out of the Communist League), conducted Japan's most infamous hijacking, that of Japan Airlines Flight 351, a domestic Japan Airlines Boeing 727 carrying 129 people at Tokyo International Airport. Wielding katanas and a bomb, they forced the plane to fly to Fukuoka and later Gimpo Airport in Seoul, where all the passengers were freed. It then flew to North Korea, where the hijackers abandoned the plane and the crewmembers were released. Tanaka was the only one to be convicted. Three of Tanaka's alleged accomplices later died in North Korea and five remain there. According to Japan's National Police Agency, another accomplice may also have died in North Korea.^[8]
• May 30, 1972: The Lod Airport massacre: an assault rifle (Sa vz.58) and grenade attack on Israel's Lod Airport in Tel Aviv, now Ben Gurion International Airport, killed 26 people; about 80 others were injured^[9]. One of the three attackers then killed themselves with a grenade, although some believe this to be an accident. Another was shot in the crossfire of the only surviving attacker Kōzō Okamoto. It has been claimed that the PFLP was behind the attack.
• July 1973: Red Army members led a hijacking of Japan Airlines (JAL) plane over the Netherlands. The passengers and crew were released in Libya, where hijackers blew up the plane.
• January 1974: Laju incident: Red Army attacked a Shell facility in Singapore and took five hostages; simultaneously, the PFLP seized the Japanese embassy in Kuwait. The hostages were exchanged for a ransom and safe passage to South Yemen in a Japan Airlines plane.
• September 13, 1974: The French Embassy in The Hague, Netherlands was stormed. The ambassador and ten other people were taken hostage and a Dutch policewoman, Hanke Remmerswaal, was shot in the back, puncturing a lung. After lengthy negotiatons, the hostages were freed in exchange for the release of a jailed Red Army member (Yatsuka Furuya), $300,000 and the use of a plane. The plane flew the hostage-takers first to Aden, South Yemen, where they were not accepted and then to Syria. Syria did not consider hostage taking for money revolutionary, and forced them to give up their ransom.^[10]
• August 1975: The Red Army took more than 50 hostages at the AIA building housing several embassies in Kuala Lumpur, Malaysia. The hostages included the US consul and the Swedish chargé d'affaires. The gunmen won the release of five imprisoned comrades and flew with them to Libya.
• September 1977: The Red Army hijacked Japan Airlines Flight 472 over India and forced it to land in Dhaka, Bangladesh. The Japanese Government freed six imprisoned members of the group and allegedly paid a $6M ransom.
• December 1977: A suspected lone member of the army hijacked Malaysia Airlines Flight 653.^{[citation needed]} The flight was carrying the Cuban ambassador to Tokyo, Mario Garcia. The Boeing 737 then crashed killing all onboard after he shot both pilots and himself.
• May 1986: The Red Army fired mortar rounds at the embassies of Japan, Canada and the United States in Jakarta, Indonesia.
• June 1987: A similar attack was launched on the British and United States embassies in Rome, Italy.
• April 1988: Red Army members bombed the US military recreational (USO) club in Naples, Italy, killing five.
• In the same month, JRA operative Yū Kikumura was arrested with explosives on the New Jersey Turnpike highway, apparently to coincide with the USO bombing. He was convicted of these charges and served time in a United States prison until his release in April 2007. Upon his return to Japan he was immediately arrested on suspicion of using fraudulent travel documents.
• The JRA launched a series of 17 bombings on buildings belonging to large corporations, including Mitsui & Co. and Taisei Corp., injuring 20 people. Eight people were killed in the 1974 bombing of Mitsubishi Heavy Industries Ltd.'s head office building in Tokyo.^[11]

Ceramic knives?  
There may be some logic but it looks like these may have aged out.