WASHINGTON -- Nearly two out of three Americans back U.S. airstrikes in Iraq and Syria to combat the threat from Islamic extremists, yet half also think there's a high risk of a future terrorist attack on American soil, according to an .

Americans surveyed were split on whether they approve of the way President Barack Obama is generally handling the threat from the Islamic State group and other terrorists, with about half approving and about half disapproving of his actions.

And despite more than a decade of costly war, about a third favour going beyond airstrikes and putting American military boots on the ground in Iraq or Syria.

Obama says he has no plans to send ground troops to Iraq or Syria. A little more than a third say they are opposed to sending them and about 1 in 4 say they neither favour nor oppose it.

"He's got to do something," said Keith Fehser, 55, who thinks the U.S. military action taken so far in Iraq and Syria has been "about the right" response. "This is the easiest way to do it."

Fehser, a commodities trader from suburban Chicago, says Americans need to see terrorism as an extremely important issue, yet they don't.

"I just think it's only going to get worse," he said. "Even though the government tries its best to keep on top of it, it's just lunacy out there with what can be done by just small groups of people."

He said most people he talks with don't care much about the U.S. airstrikes. "It's a long way away. As long as we're not letting our own people get killed, I don't think they care that much," he said, adding that he would be "very disgusted" if American combat troops were sent back to the region.

Fifty-three per cent say they think there's a high risk of a terrorist attack on U.S. soil, though just 20 per cent call it an "extremely high risk." An additional 32 per cent say the nation is at moderate risk of a terrorist attack, and 12 per cent say it faces a low risk of terror attacks.

The poll has not asked that specific question in the past. However, the finding tracks with Pew Research Center data from July indicating that concern had ebbed somewhat since the Sept. 11, 2001, attacks.

This summer, the Pew survey said 59 per cent of Americans were "very" or "somewhat worried" that there would soon be another terrorist attack in the United States. That's lower than the 73 per cent that Pew found were concerned, following 9-11, that another attack was imminent and about the same as the 58 per cent who were worried about another attack after the April 2013 Boston Marathon bombing.

Despite the concern, only a third are closely following news of U.S. airstrikes.

Dowden is among the 37 per cent surveyed who said they were following news about the airstrikes "somewhat closely." About 32 per cent of those surveyed are paying close attention to the military action, and 30 per cent say they're barely monitoring the U.S. military airstrikes.

Asked whether they favoured, opposed or neither favoured nor opposed the airstrikes, 65 per cent said they favoured the strikes in Syria, 64 per cent in Iraq.

The AP-GfK Poll was conducted Sept. 25-29 using KnowledgePanel, GfK's probability-based panel designed to be representative of the U.S. population. It involved online interviews with 1,845 adults, and has a margin of sampling error of plus or minus 2.5 percentage points for all respondents. Respondents were selected randomly using phone or mail survey methods, and later interviewed. People selected for KnowledgePanel who didn't otherwise have access to the Internet were given free access.