Good time to visit Europe . . . The Dow

The Euro is at $1.27 compared to the US dollar. The last time I was in Europe the Euro was at $1.60. It would be a great time to visit Europe.

I read a couple of theories today about why the the Dow dropped 1,000 points yesterday. One of the theories for the drop is simply from the worries about Greece and their troubles, but for the Dow to drop 1,000 points just because of Greece's problems does not sit well with me. Another theory I read is that an analyst on the trading floor accidently pushed a button to trigger a trade worth $2 billion instead of pushing the button to trigger a trade worth $2 million. How do you make that mistake?