On Thursday, the first whistle blew, ushering in the largest sporting event the US has ever hosted — or secured.

LOS ANGELES, June 10 : Security planners for the World Cup are preparing for drones to pose one of the tournament's most complicated threats, as officials seek to protect…

Threat ranges from careless spectators seeking social media footage to surveillance or attempting to disrupt matches; counter-drone companies working with law enforcement and…