|Incendiaries and explosive/flammable materials||113,700||89,623||116,200||127,176|
|Other cutting instrumentsa||163,419||101,387||59,459||N|
|Total prohibited items||13,711,759||6,516,022||972,810||129,461|
a 2008 consists of data up to Aug. 8, 2008 with the exception of Firearms and Incendiaries. TSA has stopped the collection of data on all prohibited items except for Firearms and Incendiaries as of Aug. 8, 2008.
Key: N = data are nonexistent.
Notes: Other cutting instruments include scissors, hatchets, swords, sabers, meat cleavers, ice axes, and picks. Effective Dec. 22, 2005, scissors less than 4 inches and tools less than 7 inches were no longer prohibited.
Knives include any length and type except round-bladed, butter, and plastic cutlery.
Clubs includes martial arts items, baseball bats, night sticks, hammers, pool cues, and billy clubs.
Firearms includes any weapon (including a starter gun) that is designed to or may readily be converted to expel a projectile by the action of an explosive, as well as spear guns, BB guns, flare pistols, compressed air guns, and stunning devices.
Other refers to tools, self-defense items, compressed gas cylinders, bleach, lighters, and certain sporting goods. Lighters (except for torch lighters and micro torches) were removed from the prohibited items list effective August 4, 2007.
Source: U.S. Department of Homeland Security, Transportation Security Administration, personal communication, November 2010 as reported in USDOT, RITA, BTS, National Transportation Statistics, table 2-16b, available at http://www.bts.gov/publications/national_transportation_statistics/ as of January 2011.