Hints and tips:
...Liam Kelly, chair of the Police Federation that represents rank-and-file officers, called on them to maintain “maximum vigilance” both on and off-duty....
...New York’s Metropolitan Transportation Authority is working with law enforcement “to make sure we have heightened vigilance surrounding the anniversary”, said Aaron Donovan, MTA spokesman....
...In the wake of the Hakimzadeh case, an open letter from the British Library appealed for such vigilance....
...It would emphasise patience, vigilance and the protection of liberal values rather than the desire for a quick military victory....
International Edition