From hours at security to bulletproof cockpits: How 9/11 changed air travel

Not long after several planes were hijacked and used to wreak devastation on downtown New York and Washington, DC, a quarter of a century ago, air travel for millions of people all over the world changed beyond recognition – forever.Two of the planes, hijacked by men linked to al-Qaeda, were flown into the Twin Towers at the World Trade Centre at the south end of Manhattan Island in New York City, causing the buildings to collapse and killing nearly 3,000 people.Recommended Stories list of 3 itemslist 1 of 3UK travellers face fresh chaos as more flights cancelled after glitchlist 2 of 3Marco Rubio says US seeks more economic and security ties in Latin Americalist 3 of 3How has Israel hit back against sanctions by the UK, others?end of listA third hit the Pentagon, the building in Washington that houses the United States Department of Defense, while a fourth, believed to be headed towards the White House, crashed into an empty field in Pennsylvania after passengers on board wrested control of the aircraft from the hijackers.It was the deadliest terrorist attack in US history, and all the planes had been boarded and seized with relative ease by the hijackers.Here’s a look at how life...