        OPINION
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SMITH, Circuit Judge.

     Cesar Lee worked as an environmental engineer for the United States

Department of Environmental Protection (EPA) until his employment was
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terminated in 2009. He unsuccessfully challenged his termination before the Merit

Systems Protection Board (MSPB). Thereafter, Lee filed a complaint in the United

States District Court for the Eastern District of Pennsylvania challengingIncidence of a circadian cycle of photosensitivity in the regulation of the annual testis cycle in the mink: a short-day mammal.
Like the birds or long-day mammals studied up until now the photoregulation of the annual testicular cycle in the mink, a short-day mammal, depends on phase relationships existing between the daily cycle of alternating period of light-dark and the circadian cycle of photosensitivity. Our results show, however, that the characteristics of photoresponse in the mink are exactly the opposite of those of long-day animal species. For long-day species light has a stimulating effect on the central machinery of gonadotropic control (LH-RH) whereas in the mink, the secretion of gonadotropins is induced by short days. Interpreted according to this hypothesis, the sexual cycle of the mink under natural photoperiodic