CNN

WASHINGTON (CNN) - Concern about a terrorist attack in the United States is roughly half of what it was immediately after the September 11 attacks, according to a new national poll.

Thirty-four percent of people questioned in a CNN/Opinion Research Corporation national survey released on the eve of the eighth anniversary of 9/11 say they think an act of terrorism in the U.S. over the next few weeks is likely, with 64 percent indicating such an attack is not likely. The 34 percent figure is down 20 points from three years ago and is nearly half the 66 percent who in late 2001 felt a terrorist attack was likely.

The poll also indicates that only one in 10 say that a terrorist attack is likely in the community where they live. More than six in 10 say they have confidence in the Obama administration's ability to protect the country from terrorism, although only one in four say they have a great deal of confidence.

The public is split over Attorney General Eric Holder's decision to have a special prosecutor investigate the interrogation procedures used by CIA officials during the Bush administration - half say that investigation is a good idea; half say it is a bad idea.

The survey also suggests that six in 10 say the country will never be get back to normal, with three in 10 feeling things will eventually get back to normal and 7 percent saying things in the United States are now back to normal.

The CNN/Opinion Research Corporation poll was conducted August 28-31, with 1,010 adult Americans questioned by telephone. The survey's sampling error is plus or minus 3 percentage points.

Full results (pdf)

Updated: 11:59 p.m. to add full poll results