Aviation Security Incident - A hijacked Cessna aircraft caused Vancouver International Airport to shut down, leading to commercial flights being held, circled, or diverted [1][2] - Nine flights were diverted to other airports, including Seattle [2] - The suspect, who allegedly stole the plane from a flying club in Victoria, was arrested without incident after landing safely [2][3] - Air traffic control conversation suggests the suspect may have been motivated by some type of protest [3] Security Concerns & Policy - The incident evokes a 2018 event where a Seattle airport employee stole an empty passenger plane [4] - Homeland Security Secretary is considering relaxing the TSA's 3-1-1 liquids rule, raising concerns among security experts [5] - Security experts are concerned about relaxing TSA screening shoes and liquids, citing inadequate detection technology and ongoing terrorist threats [5]