April 2 (Reuters) - Wall Street's main indexes opened

lower on Thursday, in the last session of a holiday-truncated

week, after President Donald Trump signaled more aggressive

attacks on Iran, dampening expectations for a swift end to the

Middle East conflict.

The Dow Jones Industrial Average fell 96.4 points, or

0.21%, at the open to 46,469.36. The S&P 500 fell 62.7

points, or 0.95%, at the open to 6,512.61​, while the Nasdaq

Composite dropped 368.4 points, or 1.69%, to 21,472.523

at the opening bell.