U.S. authorities say they remain concerned over a possible ‘lone wolf’ attack on the one-year anniversary of Osama bin Laden’s death.
While there are no concrete threats in retaliation for the Al-Qaeda leader’s death on May 1 last year, the Department of Homeland Security warns against possible solo attacks against the country and its citizens.
These attacks are often carried out in the name of a terrorist organisation, but are committed by only one person.