A member of the police bomb squad walks away from an unattended backpack left on the road near the finish line of the Boston Marathon in Boston. A man is in police custody following the security alert, which prompted evacuations of the surrounding area.
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President Trump has signed proposals for regulations to "ban all devices" like bump stocks, which were used in the Las Vegas shooting.
The Prime Minister has been warned that she must make a decisive choice about what kind of trade deal she wants after Brexit.