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Blair issued a statement praising the cooperation between the two countries , saying it " underlines the threat we face and our determination to counter it . The combination of the chlorinity and salinity profiles , a low temperature anomaly recorded by the downhole logging TAP tool , and high porosity intervals in shales suggest that the brines are sourced externally through the black shales . The problem in Iraq is almost always framed incorrectly : we 'd have little problem destroying that country , like we did Dresden , Tokyo , etc ., if indeed the war was thought to be necessary and justified . This planning and monitoring study can be most effective if initiated before significant additional development involving the deployment of artificial light sources is undertaken . " There is only one chromophore ( one molecule ) that is responsible for a chemical reaction that takes place in the eye allowing humans to see , " Zand said , " that molecule is Retinal , a form of vitamin A. " Retinal combines with a protein called Opsin to form Rhodopsin , the chemical entity ( protein ) responsible for vision .