My thoughts are with those who lost loved ones. Being a native NYer (was living in San Francisco at the time), it will always be the worst day ever. On Sept 2nd 2001, I had just come back to NY to attend a wedding that was a wedding cruise, that was all the way downtown NY. The husband and wife lived in Tribecca. Anyway, my exwife and I took some amazing pictures of downtown NY, including a dozen or so of the WTC. Who knew, 9 days later they'd be destroyed and almost 3,000 people lost their lives in the towers (as well as in DC and Pennsylvania).
Also, in my career I worked mostly near Wall Street for 14 years, my train went through WTC thousands of times in my career. I can still see the 1st floor with all of the shops and restauraunts in my head. What a horrendous day for everyone.
NY certainly showed a ton of strength and character right after the attacks, what an incredibly strong city, I'm proud to be a NYer and an American.