WASHINGTON (Reuters) – The United States is ahead of the game in its fight against radical Islamists but it must remain nimble and pursue its enemies to new battlefields in Yemen and elsewhere, two key U.S. senators said on Sunday.

“It’s a war with many battlefields,” Senator Joseph Lieberman, chairman of the Senate Homeland Security Committee, said of the fight against al Qaeda and its allies. “We are on the verge of really an extraordinary turnaround and success in Iraq,” Lieberman said.

“President (Barack) Obama is committed to win the war in Afghanistan, and I think we have got an extraordinary team there. … And we will succeed in Afghanistan,” Lieberman said.

“We have chased some of the al Qaeda enemy to Yemen, but the fact is that in the last year, there have been more than a dozen known attempted terrorists attacks on the homeland of the United States. Three of them broke through our defenses,” he added