Published: Feb 26, 2013 6:28 PM EST
Updated: Feb 26, 2013 6:33 PM EST

FORT MYERS, Fla.- The rules have been in place for years, but thousands of travelers are still trying to carr on items banned by airport screeners. Federal Security Director Robert Cohen showed off a number of items intercepted by officers at Southwest Florida International in just the last week

Robert Cohen set up the display, which included dozens of knives, weapons, tools, and a glove that resembled Freddy Kreuger's in the "A Nightmare on Elm Street" film series.

One of the biggest concerns is undeclared firearms. Two guns have been intercepted at RSW so far this year. Officers took seven in the security screening line in 2012. On the national level, more than 1,500 guns were intercepted at airports across the U.S. Cohen said the majority of them were loaded.

"That stops the checkpoint. That stops operations and we've got to take immediate action," he said.

Bringing a prohibited item, knowingly or not, will not only cause you to hand it over, it could lead to longer wait times.

"When we check a bag because of the prohibited item that's in a bag, it could take anywhere from 3-4 more minutes, multiply that times the number of passengers that may have a prohibited item and you've now just extended your wait time for peoples flights or making your flights," Cohen said.

Liquids, aerosols and gels, in limited quantities, are safe to bring aboard. The TSA reminds passenger of the 3-1-1 rule for carry-ons: 3.4 ounce (100ml) bottle or less (by volume); 1 quart-sized, clear plastic, zip-top bag; 1 bag per passenger placed in the screening bin.

For a full list of TSA guidelines, click here.