President Trump has become the third president to renew a post-9/11 emergency proclamation, stretching what was supposed to be a temporary state of national emergency after the 2001 terror attacks into its 17th year. The executive branch has ignored a law requiring it to report to Congress every six months on how much the president has spent under those extraordinary powers. 16 years ago ... President Bush signed Proclamation 7463, giving himself sweeping powers to mobilize the military. Presidents Bush and Obama renewed that emergency each year. And on Wednesday, Trump published a now-routine notice in the Federal Register extending the emergency for the 16th time, explaining simply that "the terrorist threat continues." "The president is given these emergency powers as a temporary measure until Congress has time to act. It stretches credulity to think Congress hasn't had time to act since 9/11 happened," said Elizabeth Goitein ... at the Brennan Center for Justice. The perpetual war footing has had a striking lack of examination. Congress is ... supposed to review each emergency every six months. It never has. And it's not just 9/11. Presidents have declared scores of emergencies over the past 40 years. More than 30 of those national emergencies remain in effect - and Congress has never reviewed a single one. At the same time, the Pentagon has stopped releasing regular reports on the number of National Guard and Reserves called up to serve overseas as a result of the 2001 emergency.