Terror on U.S. soil brought tumult to world markets overnight as investors try to make sense of tragedies in New York and Washington. As trading opened in London, the FTSE 100 Index dropped by 62 points to 4684 at the open, a new 35-month low. However, as the session continued, traders in Britain became less skittish, and the FTSE was trading up 1.1% to 4787 in late-morning trading. Continental markets seemed to follow suit. In Frankfurt, the Dax slumped more than 50 points at the open and lost 1.5% early, but it quickly regained its footing, recently trading down just 0.25% at 4264. In Paris, the CAC 40 lost nearly 3% as the market opened at 3943. That is on top of a 7.4% decline Tuesday, a 30-month low. In late-morning trading, the Paris market recovered and recently traded at 4055, largely unchanged from Tuesday's close. Most European exchanges suspended trading in most U.S. equities Wednesday. And, European exchanges announced they will suspend trading for one minute at 8:45 a.m. EDT Wednesday to recognize a moment of silence for U.S. casualties from the terror that began about that time Tuesday morning.