Airline passengers bearing one-way tickets often elicit a closer look from airport security. Thus, U.S. Customs and Border Protection officials at San Francisco International Airport considered it a routine search when they stopped a man with a one-way ticket from China. Stuffed in his suitcases were 1,500 circuit breakers, all counterfeit. According to industry experts familiar with the case, the man was a former employee of Square D, a large manufacturer of electrical components in Palatine, Ill. Officials later discovered that another shipment of one million counterfeit Square D breakers had slipped past security, spreading through the marketplace like a
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.