Glad to see they managed to stop him from doing whatever he set out to do, and even without having to kill him. A couple decades ago he might have gotten away with it... but not anymore. There's something a lot of people don't understand about why the hijacking attempts worked on 9/11 and why they haven't worked since, don't work now, and never will again.
Before 9/11, nobody had ever weaponized a passenger plane like that, at least not in a way that was so wholly in the public eye. Almost nobody thought of planes as these big missiles that can be commandeered and rammed into buildings. If someone hijacked a plane, it was for transport. They wanted to get out of country, or they had demands. Before 9/11, the best way to ensure the safety of crew and passengers was to cooperate and wait for the authorities.
So when it happened on 9/11, everyone cooperated, thinking they'd be let off when the terrorists got what they wanted. They were following procedure, because until that day, the procedure worked. That's how a couple of guys with box cutters took over a 30+ passenger plane. Flight 93 shows what happened when the passengers and crew figured out the terrorists had no plans of letting them land safely. They realized they had nothing to lose by fighting, and God knows how many lives they saved with their actions.
These days everyone remembers 9/11. Nobody will ever "trust" a hijacker with an aircraft ever again. Even when someone says they've got a bomb onboard, it doesn't mean as much because "What are you going to do? Blow us up before you ram us into a building?" Passengers and crew both understand now that their best hope in surviving a hijacking situation is to fight.
Airlines and government organizations have made a lot of changes to their equipment and procedure, but I think the biggest thing safeguarding us against this happening again is that we remember when it happened on 9/11. Passengers and crew both just won't let that happen again as long as there's an able-bodied person with a shred of courage and sense on board.
All that said... Very glad to hear the hijacker was subdued with minimal trouble. It's always good to hear when something that could have turned tragic didn't.