By Yossi Melman, Haaretz Correspondent

The Israeli firm ICTS International (not to be confused with ICTS Europe, which is a different company), and two of its subsidiaries are at the crux of an international investigation in recent days, as experts try to pinpoint the reasons for the security failure that enabled Umar Farouk Abdulmutallab to board Northwest flight 253 and attempt to set alight explosives hidden in his underwear.

A Haaretz investigation has learned that the security officers and their supervisor should have suspected the passenger, even without having early intelligence available to them.

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