Washington ? Widening war in “the most dangerous place in the world,” President Barack Obama launched a fresh effort Friday to defeat al-Qaida terrorists in both Pakistan and Afghanistan, defending his strategy with shades of the dire language of George W. Bush.

Stirring echoes of Sept. 11 and making the war his own, Obama warned that al-Qaida is actively planning attacks on the United States from secret havens in Pakistan. He said he was setting new benchmarks and sending in 4,000 more troops, hundreds of civilians and increased aid for a war that has lasted more than seven years and still has no end in sight.

“I want the American people to understand that we have a clear and focused goal: to disrupt, dismantle and defeat al-Qaida in Pakistan and Afghanistan, and to prevent their return to either country in the future,” Obama said. “That’s the goal that must be achieved. That is a cause that could not be more just.”

The president, who declared last weekend an “exit strategy” was needed for Afghanistan, never used those words in announcing his plans on Friday. His strategy is built on an ambitious goal of boosting the Afghan army from 80,000 to 134,000 troops by 2011 — and greatly increasing training by U.S. troops accompanying them — so the Afghan military can defeat Taliban insurgents and take control of the war.

That, he said, is “how we will ultimately be able to bring our troops home.”

There is no timetable for withdrawal, and the White House said it had no estimate yet on how many billions of dollars its plan will cost.

The essence of Obama’s strategy is to set clear goals for a war gone awry, to get the American people behind them, to provide more resources and to make a better case for international support. He is heading next week to a NATO meeting in France and Germany, where he expects allies to pledge more help of their own.

Much like Iraq, the war effort in Afghanistan has been longer and costlier than American leaders expected.

U.S.-led forces toppled the militant Taliban government there after the terrorist attacks on America in 2001, but many militants fled and regrouped in neighboring Pakistan. Obama said that Afghanistan will now get the resources it should have received years ago, “denied because of the war in Iraq.”

Since becoming president, Obama has ordered 21,000 troops into Afghanistan, counting 17,000 combat forces who will try to quell surging violence. The Pentagon says that will put the U.S. total there at more than 60,000, the most to date. As the Iraq conflict winds down, the Afghanistan war is growing.

Taking firm control of the war that dominated Bush’s presidency, Obama broke with his predecessor in significant ways but also used phrases that sounded strikingly familiar.

He described the ruthlessness of the enemy, the need to take on terrorists, the genesis of the fight. Bush often reminded the nation that terrorists were plotting to kill Americans, even as the public fear dissipated with each passing year after the 9/11 attacks.