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Three of them left last month after the agency announced it would drop several lawsuits against several coal-burning utilities for violating the Clean Air Act. The government should be ashamed of themselves for not telling us what we were exposed to . That means that we have the capacity , and the capability , and the will to do what we need to do in almost any environment . Whenever it is difficult to measure or monitor performance , forcing people to do what we want can backfire . Such tactics were an open invitation for retaliatory ground attacks . Rat Brain Digital Image Gallery - The rat brain has served as an excellent model for elucidating the complex anatomy and physiological mechanisms of the human brain . But we can only do what we can do .