President Obama’s three nominees to serve on the National Labor Relations Board remain in limbo as controversy embroils one of them: Craig Becker, associate general counsel to the Service Employees International Union and the AFL-CIO. Photo: Senate Help Committee Becker has strong support from unions but is opposed by business groups. Business groups strongly oppose Becker’s nomination, contending his academic writings on topics such as the Employee Free Choice Act, which is organized labor’s top priority and would make it easier for unions to organize, demonstrate a strong pro-union bias. Organizations like the Associated Builders and Contractors and the U.S.
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.