EDISON - The head of the TSA stood his ground today as lawmakers on Capitol Hill questioned him on the decision to allow passengers to bring pocket knives on planes.

TSA administrator John Pistole defended the decision, saying the TSA needs to focus on explosives that can bring down airplanes. He said the thousands of pocket knives being confiscated by TSA agents is clogging the system. He said small knives pose virtually no security risk.

Flight attendant unions, however, have come out against allowing knives. Flight attendants say it puts them in jeopardy.

Other banned items that will be allowed on planes include golf clubs, pool cues, small novelty bats and hockey sticks. The new rule goes into effect April 25.