WASHINGTON - President Barack Obama on Monday reversed his two-year-old order halting new military charges against detainees at Guantnamo Bay, Cuba, permitting military trials to resume with revamped procedures but implicitly admitting the failure of his pledge to close the prison camp. Obama said in a statement that he remained committed to closing Guantnamo someday and to charging some terrorism suspects in civilian criminal courts. But Congress has blocked the transfer of prisoners from Guantnamo to the United States for trial, frustrating the administrations plan to hold civilian trials for Khalid Shaikh Mohammed, the self-professed chief plotter of the Sept 11 attacks, and others accused of terrorism in US. From the beginning of my administration, the United States has worked to bring terrorists to justice consistent with our commitment to protect the American people and uphold our values, Obama said. Today, I am announcing several steps that broaden our ability to bring terrorists to justice, provide oversight for our actions, and ensure the humane treatment of detainees. I strongly believe that the American system of justice is a key part of our arsenal in the war against al-Qaeda and its affiliates, and we will continue to draw on all aspects of our justice systemincluding Article III Courtsto ensure that our security and our values are strengthened. Going forward, all branches of government have a responsibility to come together to forge a strong and durable approach to defend our nation and the values that define who we are as a nation. Attorney General Eric Holder said in a statement the administration still maintains it is essential that the government have the ability to use both military commissions and federal courts as tools to keep this country safe. Unfortunately, some in Congress have unwisely sought to undermine this process by imposing restrictions that challenge the executive branchs ability to bring to justice terrorists who seek to do Americans harm, Holder said. We oppose those restrictions, and will continue to seek their repeal. Holder said the government would continue to pursue cases against the detainees and added the presidents executive order strengthens the legal framework under which we will continue to detain those individuals who are at war with our country and who pose a significant threat to the security of the United States. Secretary of State Hillary Clinton said in a statement the administration was reaffirming it will follow Geneva Convention protocols in treating detainees humanely. These steps we take today are not about who our enemies are, but about who we are: a nation committed to providing all detainees in our custody with humane treatment, Clinton said. We are reaffirming that the United States abides by the rule of law in the conduct of armed conflicts and remains committed to the development and maintenance of humanitarian protections in those conflicts. The freeze on prosecutions at Gitmo has been in place since January 2009. There are about 170 prisoners at the facility, down from 242 when Obama took office, the Los Angeles Times said.