Cities in the United States took security precautions , especially at sites where large crowds were expected , as well as sports events , concerts , the French embassy and other French government sites . William J. Bratton , the New York City Police Commissioner , said the Paris attacks have changed the way law enforcement deals with security . Singapore raised its national security alert level , stepping up border checks and security across the city-state . Police and military authorities in Manila were placed on full alert in preparation for the APEC Economic Leaders ' Meeting
APEC Economic Leaders ' Meeting
APEC Philippines 2015
November 2015 Paris attacks