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

lower on Monday after President Donald Trump revealed plans to

double tariffs on imported steel and aluminum, fueling more

uncertainty around U.S. trade policies.

The Dow Jones Industrial Average fell 70.1 points, or

0.17%, at the open to 42199.94. The S&P 500 fell 15.0

points, or 0.25%, to 5896.68​, while the Nasdaq Composite

dropped 50.7 points, or 0.27%, to 19063.06.