Obama, in radio address, says U.S. “remains vigilant” about terrorist threats (VIDEO)

U.S. President Barack Obama, in a radio address on the eve of the 10th anniversary of September 11, praised the resilience of the American people and called for continued vigilance against terrorist threats.

"They wanted to terrorize us, but, as Americans, we refuse to live in fear," Obama said in his weekly radio address Saturday. "Yes we face a determined foe, and make no mistake — they will keep trying to hit us again. But as we are showing again this weekend, we remain vigilant."

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Obama will mark Sunday's anniversary of 9/11 by visiting the sites attacked by hijacked planes, USA Today reports. He will visit Ground Zero in New York City, the field in Shanksville, Pa., where United Flight 93 crashed, and the Pentagon. In the evening, he will attend a concert at the Kennedy Center.

In his radio address, Obama also honored the memories of those who died on September 11, 2001, and praised the military and counter-terrorism personnel who have lost their lives in the decade since, describing U.S. troops and their families as "our extraordinary 9/11 Generation," USA Today says.

“We’ve taken the fight to al Qaeda like never before,” the president said, The New York Times reports. “Over the past two and a half years, more senior al Qaeda leaders have been eliminated than at any time since 9/11. And thanks to the remarkable courage and precision of our forces, we finally delivered justice to Osama bin Laden.”

Obama did not refer specifically to the terror threat about possible attacks in New York and Washington, but said, "we're doing everything in our power to protect our people. And no matter what comes our way, as a resilient nation, we will carry on."