SDI: If missile defense technology is so "untested and unreliable," as Democrats keep telling us, why are the tech-savvy Japanese so hot for it? One of the major criticisms Democrats have of the various national missile defense programs is that the tests thus far allegedly have been scripted, not representing real-life missile combat conditions, with the results mixed and unconvincing. Carl Levin, chairman of the Senate Armed Services Committee, says the operational testing is unconvincing. Over on the House side, seven Democrats, in a letter sent to former Defense Secretary Donald Rumsfeld, complained of "tests that have been highly scripted...