A case with potentially far-reaching ramifications for employers came closer to a decision on Dec. 8 when the nation’s top court heard oral arguments. Photo: AP Customs agents patrol the border at Nogales, Arizona. Related Links: The 2007 Immigration Bill Battle The ‘Death Penalty’ Law and President Obama At issue in the case--Chamber of Commerce v. Whiting--is whether an Arizona law that imposes sanctions on employers that knowingly hire illegal immigrants can stand, or whether federal immigration law should preempt the statute. Other states that would like to enact similar legislation or have laws already in place are watching the
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.