Washington ? Pilots pack guns in the cockpit. Passengers stoically wait in line at security checkpoints. Experts trained in the nuances of human behavior roam airports searching for potential terrorists.

These are just some of the hundreds of safeguards imposed in the seven years after 9/11 and, according to a new Ipsos-McClatchy poll, a strong majority of Americans believe there is now adequate security in airports and airplanes. Some, in fact, think there is too much.

Fifty-two percent of the public believes the government and airlines have done enough in improving security on airplanes since the terrorist attacks of Sept. 11, 2001, and 10 percent believes the improvements have been excessive.

At the opposite end of the spectrum, 38 percent believe that more needs to be done to safeguard passengers from potential terrorism.

The survey produced similar opinions about security measures now in place in airports. The breakdown: Enough, 50 percent. Too much, 15 percent. Not enough, 35 percent.

Clifford Young, senior vice president for Ipsos Public Affairs, said the findings show that Americans “are overall confident” with security in airports and airplanes.

But with at least a third saying more needs to be done, “there is still the need to look at those who don’t believe the government and airlines are doing enough,” said Young.

The terrorist hijackings that killed nearly 3,000 Americans led to the creation of the Transportation Security Administration in 2002, leading to what TSA spokesman Christopher White calls the “highest level” of aviation security in history.

About 43,000 TSA officers screen 2 million people and 3.5 million bags each day. The agency also has 500 bomb-sniffing dogs and plans to add 200 more to sniff cargo for potential explosives.