I was in my office in NYC at 6th Av & 18th street. I had a clear view of the towers from the corner. I was at my desk early that day, my co-worker came in crying saying that the world trade center was on fire. I went down to the street and saw the towers flaming at the top. I went back up to my office to try and send some e-mails, and see what was going on via internet, but nothing worked. I then tried to make some phone calls, the lines were all busy, and my cell phone didn't work either. So I went back down to the street, things were so eerie, noise of sirens, people crying, walking in the streets, etc. I was on the corner of 6th Av & 14th street when looking over my shoulder, in the distance saw what looked like a big grey cloud forming at the top of one of the towers, and then it started to crumble down and finally only one was standing. It was shuddering. We were shocked and speechless. We stayed at that same corner, shell shocked, thinking the world was ending, and a short time later, that same grey cloud formed at the top of the other tower and we saw it come crumbling down. I remember the huge hole of light that appeared at the end of 6th Av in the distance where the towers stood just an hour or so before. We still didn't know what happened. We walked back to our office, silent. We went into a conference room where people were watching TV and then we learned of the plane that crashed into the pentagon and another plane crash in Pennsylvania. We didn't fully understand even then. I then remember president bush speaking and his dumb phrase "we're gonna get the folks that did this", and thinking how can this be happening. My sense of security in New York City was never the same after that day. I walked back home to the upper west side in a daze, and shortly after decided I can't live in this city anymore, nothing was ever the same for me after that day. Later that year I started to travel around as much as I could looking for a new city to feel at home in and one of my trips was to Buenos Aires. I came here in 2005 for the first time and loved it so much and came to stay permanently in 2007. Me being here is closely tied to Sept. 11th. and what I experienced that day.