Mr. Johnson appeared to have a website of designs of vintage cars, motorcycles, and other transportation devices that could be ordered on a variety of items, including shirts, cards and coffee mugs.

WSJ: Deadly Clash Started in Workplace

The figures are a part of Mercer's annual cost of living survey, which covers 143 cities across six continents and measures the relative cost of more than 200 items in each location, including housing, transportation, food, clothing, household goods and entertainment.

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"This is part of an overall risk-based security approach, which allows Transportation Security officers to better focus their efforts on finding higher-threat items such as explosives, " a TSA spokesman told the Reuters news agency.

BBC: TSA to allow some small knives in carry-on luggage