President Barack Obama has vowed that the US will not "leap before we look" in response to Syria's alleged use of chemical weapons.
At a press conference, as part of a visit to Costa Rica, Obama said he does not foresee a scenario in which he would dispatch US troops to Syria.
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Ahmed Hassan, 18, has been charged with attempted murder and causing an explosion with intent to endanger life.
A growing number of rank and file officers say they support being routinely armed while on duty in the wake of terror attacks.