The bear is back on Wall Street: The Dow Jones fell below 10,000 on Tuesday for the first time since February 8, driven down by fears over the health of European banks and a possible geopolitical crisis on the Korean Peninsula. The declines were steeper closer to the hearts of those crises, as European and Asian markets took even worse beatings. By day's end, the Dow had recovered to close just above the 10,000 point mark, at 10,043.75. "The main thing that is dominating the market right now is the potential for government events of various types, and that sort of risk is very hard to measure," said one industry analyst. "As long as that's the case, I think we're going to continue to see big intraday swings like this."