"The crackdown by Libyan leader Muammar al-Qaddafi on mass anti-regime protests in early 2011 resulted in strong condemnation by the international community. In a historic move, the UN Security Council invoked the principle of "responsibility to protect" and adopted Resolution 1973, endorsing a no-fly zone over Libya and authorizing member states to "take all necessary measures" to protect civilians under attack from Qaddafi's government."(Quoted from Article)