ABC's Karen Travers reports:
President Obama defended the U.S. military involvement in Libya this evening as a necessary humanitarian intervention to prevent a massacre, saying that while the United States does not rush into war, "mindful of the risks and costs of military action," there are times when American interests and values are at stake and presidents have a "responsibility to act."
"That is what happened in Libya over the course of these last six weeks," he said.
The president defended the military operations launched by the U.S.-led international coalition as necessary to stop Libyan leader Moammar Gadhafi, whom the president labeled a "tyrant" that launched violence against his own people.
"Innocent people were targeted for killing. Hospitals and ambulances were attacked," the president said. "Journalists were arrested, sexually assaulted, and killed. Supplies of food and fuel were choked off."
Taking on critics who have said that the United States should not use military intervention or "police the world," Obama acknowledged that the American military cannot be deployed "wherever repression occurs"
But he said that cannot be an argument for inaction.
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