Only a few weeks after President Obama's controversial decision to delay the building of the Keystone XL pipeline, the Obama administration is expected in the next several weeks to approve a 500-mile green energy transmission line project running through Arizona and New Mexico that his own Defense Department says may pose "an unacceptable risk to national security." The multibillion-dollar electric power line project, financed by a group called SunZia, would connect wind power facilities in eastern New Mexico to the electric grid and supply power to Arizona and California. About 45 miles of the transmission lines would be located in...