Damian Dovarganes, Associated Press
LOS ANGELES — South Korean security officials screened a man with a bulletproof vest before he got on a flight to Los Angeles, but they never detected a banned smoke grenade concealed in his checked luggage with a cache of knives, handcuffs, a gas mask and other weapons, a U.S. official said Wednesday.
Yongda Huang Harris and his carry-on luggage were thoroughly searched, but authorities found nothing suspicious and he boarded the flight, said a Homeland Security official briefed on the investigation. The official was not authorized to discuss the case publicly and spoke with The Associated Press on condition of anonymity.
Harris, 28, was arrested in Los Angeles last week during a stopover on a trip from Japan after U.S. Customs and Border Protection officers noticed the bulletproof vest. A search of Harris' checked luggage uncovered the smoke grenade and an array of suspicious items, including leg irons, body bags, a hatchet, billy clubs, a collapsible baton, duct tape and a biohazard suit.
U.S. officials were working with South Korean authorities to determine how the grenade slipped through screening.
Harris is not cooperating with federal officials who are trying to determine why he was headed to Boston with the cache of weapons, authorities said. The smoke grenade was X-rayed by police bomb squad officers, who said the device fell into a category that is prohibited on board passenger aircraft.
Tom Blank, a former deputy administrator at the Transportation Security Administration, said the U.S. will likely look at whether the failure to detect the grenade on a U.S.-bound jet was a one-time lapse or part of a wider security vulnerability.
If the U.S. determines a country's airport doesn't meet U.S. standards, it can ask for stronger security measures and even prohibit flights from flying directly to the U.S. from that country.
"This clearly looks like an error. Something slipped through that should not have slipped through," Blank said of the grenade.
Many of the other belongings authorities say they found in Harris' luggage — including the hatchet and knives — wouldn't violate TSA guidelines for property in checked luggage. Also, bulletproof vests and flame-resistant pants like the ones Harris was wearing aren't listed among prohibited items aboard flights.
There is no indication that Harris, who does not have a criminal record, is linked to a terrorist organization or planned to damage the plane, and it's not likely a smoke grenade could bring down the aircraft, the federal official said.
But the smoke grenade is banned from planes under the United Nations' explosives shipping rules. Depending on the conditions when it is ignited, the grenade could fill the cabin with smoke or cause a fire, officials said.
Customs officers believed that the lead-filled, leather-coated billy clubs and collapsible baton might be prohibited by California law, according to an affidavit filed in U.S. District Court.
Rules, or the lack of them, that govern what passengers can do, carry or wear on flights can seem alternately reasonable or unfathomable.
Increased airline security after 9/11 sought to armor flights against terrorist threats, but they can also test credulity for those getting on board.
An intrusive pat-down by security or the discovery of a too-big bottle of tanning lotion can leave a passenger feeling violated, while Harris, outfitted in a bulletproof vest, flame-retardant pants and knee pads underneath a trenchcoat, with a concealed arsenal in his luggage, appears to have triggered no suspicion before arriving in Los Angeles.
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