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On February 9, 2011, [[Tennessee House of Representatives]] member [[Bill Dunn (American politician)|Bill Dunn]] introduced House Bill 368, which states that "teachers shall be permitted to help students understand, analyze, critique, and review in an objective manner the scientific strengths and scientific weaknesses of existing scientific theories covered in the course being taught." On February 16, 2011, [[Tennessee State Senator]] [[Bo Watson]] introduced an identical bill, Senate Bill 893. The House Bill was passed by the House Education Committee on March 29, 2011, and referred to the House Calendar and Rules Committee. [[Alan I. Leshner]], the Chief Executive Officer of the [[American Association for the Advancement of Science]] and Executive Publisher of the journal [[Science (journal)|Science]], wrote to the House of Representatives opposing the Bill, stating "There is virtually no scientific controversy among the overwhelming majority of researchers on the core facts of global warming and evolution. Asserting that there are significant scientific controversies about the overall nature of these concepts when there are none will only confuse students, not enlighten them."