Flying has wholly changed since Al Qaeda hijackers carried retired the violent attacks of September 11, 2001, 25 years ago.
The recently created Transportation Security Administration replaced the backstage screening checkpoints that flyers were utilized to and introduced a caller normal astatine airports — 1 wherever h2o bottles are emptied, bodies are scanned, and goodbyes are said earlier reaching the gate.
The planes were likewise hardened pinch bulletproof doors and the strictest protocols for cockpit access; pilots and formation attendants besides received further training to grip terrorists.
Arik Arad, who advised the President's Commission connected Aviation Security and Terrorism pursuing the 1988 bombing of Pan Am Flight 103 and served arsenic caput of information astatine Israel's Ben Gurion Airport, said that these changes were portion of a post-9/11 paradigm displacement favoring a layered attack to security.
"The rule is elemental — if 1 furniture fails, different should observe aliases extremity the threat," Arad, who now operates an aviation cybersecurity company, told Business Insider. "Intelligence, rider assessment, screening, baggage security, airdrome entree control, craft protection, trained personnel, and rule enforcement each became parts of an interconnected information system. That alteration successful accuracy was, successful my view, much important than immoderate individual exertion introduced aft the attacks."
Here are the biggest ways flying has changed since 9/11.
After the September 11 attacks, airdrome information was federalized done the constitution of the Transportation Security Administration.
Before 9/11, airdrome information was handled by galore backstage companies.
In November 2001, the Aviation and Transportation Security Act established the Transportation Security Administration, a national agency whose trained workers took complete information screening astatine airdrome checkpoints by November 2002.
There are still 20 US airports that usage backstage contractors alternatively of national labor done the TSA's Screening Partnership Program. In an effort to curb staffing shortages and agelong information lines resulting from missed paychecks during authorities shutdowns, the Trump management is pushing for greater privatization.
The agency has besides travel nether scrutiny for its effectiveness. In 2015, an soul Department of Homeland Security investigation recovered that the TSA grounded to observe weapons and clone explosives carried by undercover agents 95% of the time, starring the acting caput of the Transportation Security Administration to beryllium reassigned.
Cockpit doors were reinforced.
Flight attendants utilized to person keys to unfastened the cockpit from the outside. After 9/11, the cockpit sewage reinforced, bullet-resistant doors and could only beryllium opened from the wrong erstwhile locked.
More aerial marshals were placed connected flights.
In the years pursuing the September 11 violent attacks, thousands of caller aerial marshals were added to the Federal Air Marshal Service, which antecedently had less than 50, according to the Government Accountability Office.
Pilots and formation attendants received much training successful protect tactics.
Mark Stephens, a retired Delta Air Lines pilot who flew for the hose for 30 years, told Business Insider that pilots were antecedently trained to accommodate hijackers' demands and return them wherever they wanted to spell successful bid to bargain time. That changed erstwhile the 9/11 violent attacks showed really planes themselves could beryllium utilized arsenic a weapon.
"Up until September 11th, utilizing the airplane arsenic a kamikaze-type point was never, ever, ever discussed," he said.
After 9/11, pilots received further protect training focused connected thwarting imaginable cockpit invasions and fending disconnected attackers while seated astatine the controls. The Federal Flight Deck Officer program, launched successful 2003, besides authorized qualified pilots to transportation firearms connected board.
More bomb-sniffing dogs were deployed to airports.
Bomb-sniffing dogs had been utilized for information sweeps earlier 9/11, but the TSA took complete and expanded the programme successful 2002, training dogs to observe explosives successful and astir the airport, including connected persons and luggage.
In 2025, the TSA's Canine Training Center deployed 1,076 proscription information master canine teams and accepted explosives discovery canine teams astatine much than 100 US airports.
By the extremity of 2002, each checked bags were screened for explosives.
The Aviation and Transportation Security Act mandated the screening of each checked bags for explosives, weapons, and different vulnerable items — a request that had not antecedently been required aliases wide practiced.
The TSA said it's chiefly looking for weapons and explosives.
The TSA's website said its systems are designed to "detect imaginable threats to aviation and passengers," and its "security officers do not hunt for forbidden drugs" but will mention immoderate recovered to rule enforcement.
Only ticketed passengers were allowed past security.
People who were not walking themselves utilized to beryllium capable to spell done airdrome information to driblet disconnected aliases meet ticketed passengers astatine the gate. After 9/11, pinch fewer exceptions, only ticketed passengers were allowed past information checkpoints.
This information modular is opening to change. In September, the TSA launched a Gateside walk program allowing TSA PreCheck members and those pinch a Known Traveler Number from different trusted recreation programs who registry successful beforehand to spell done information without a boarding walk astatine 13 US airports.
Orlando International Airport has a similar program successful coordination pinch the TSA.
In 2006, carry-on liquids were restricted to 3.4 ounces arsenic a consequence of a foiled violent crippled involving liquid explosives.
In 2006, UK authorities uncovered a planned violent onslaught involving liquid explosives hidden successful bottles of soft drinks that would person been detonated connected planes walking to the US and Canada.
As a result, the US temporarily banned each liquids and gels successful carry-on luggage, pinch exceptions for items for illustration babe formula, bosom milk, and medicine medications. The regularisation was past adjusted to immoderate liquids and gels larger than 3.4 ounces, a norm that remains successful spot astatine TSA checkpoints.
Full-body scans were added to TSA screenings aft an attempted bombing successful 2009.
After an Al Qaeda violent attempted to detonate explosives hidden successful his underwear connected a Northwest Airlines formation connected Christmas Day successful 2009, the TSA implemented full-body scans, known arsenic precocious imaging technology, into screening.
The machines usage millimeter activity exertion to observe some metallic and non-metallic items.
TSA Precheck was introduced successful 2011 to expedite information lines for vetted travelers.
Travelers who use for TSA PreCheck acquisition a inheritance cheque and, if approved, salary up to $85 to person a Known Traveler Number. TSA PreCheck allows passengers to hold successful separate, faster-moving information lines pinch less restrictions.
Post-9/11, Arad said intelligence agencies worldwide worked much intimately together connected aviation security.
Beyond the airdrome gates, Arad told Business Insider that intelligence agencies crossed countries started sharing accusation much openly to emblem imaginable threats, a alteration he witnessed firsthand arsenic caput of information astatine Ben Gurion Airport.
"We stock information, and it helps, because if location is simply a bad feline successful Germany and he's readying connected coming to the US, group are alert of it and they're waiting for him," Arad said. "I'm telling you, I cognize it. I've been there."
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