Obama acknowledges Americans' fear of terrorism but vows to overcome threat

WASHINGTON, Dec 6 (Reuters) - President Barack Obama vowed on Sunday to hunt down anyone plotting militant attacks against the United States as he sought to reassure Americans after a deadly California shooting rampage that has raised new questions about U.S. defenses against homegrown extremism.

In a rare Oval Office address, Obama tried to counter mounting criticism he has not acted decisively enough to keep the United States safe from the Islamic State militant group, but he stopped short of offering any major shift in his strategy.

"The threat from terrorism is real but we will overcome it," Obama said in a nationally televised speech.

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