This chapter will cover the search for dark matter axions based on microwave cavity experiments proposed by Pierre Sikivie. We will start with a brief overview of halo dark matter and the axion as a candidate. The principle of resonant conversion of axions in an external magnetic field will be described as well as practical considerations in optimizing the experiment as a signal-to-noise problem. A major focus of this chapter will be the two complementary strategies for ultra-low noise detection of the microwave photons--the 'photon-as-wave' approach (i.e. conventional heterojunction amplifiers and soon to be quantum-limited SQUID devices), and 'photon-as-particle' (i.e. Rydberg-atom single-quantum detection). Experimental results will be presented; these experiments have already reached well into the range of sensitivity to exclude plausible axion models, for limited ranges of mass. The section will conclude with a discussion of future plans and challenges for the microwave cavity experiment.

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Interview with T. G. Crews, a Marine WWII veteran and POW from Stephenville, Texas. Crews, among the first Americans taken prisoner by the Japanese during the war, discusses his time with the North China Marines in Peking, his unit's duties there, his capture, and his experiences during internment at Tianjin, Shanghai, Peking, Busan, and Hakodate.

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Alphabetical directory listing of federal agencies including their toll-free telephone number and a description of information provided by the agency.

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