Security in some Michigan areas has increased today after a group of deadly explosions in London.
The state's universities worked to account for students spending the summer in Britain's capital.
At the country's busiest trade border crossing with Canada, the company that runs the tunnel linking Detroit and Windsor, Ontario, increased security protecting the crossing's infrastructure.
A spokesman for Detroit and Canada Tunnel would not give details on the changes, but says they have not slowed travel under the Detroit River.
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