With the approach of the 10th anniversary of September 11 attacks, U.S.A government has already alerted its citizens for traveling worldwide. The traveling alert cautions the citizens of USA against the continuous threats from Al Qaeda and other extremist groups.
Though the State department haven't cited or identified any specific threats, they have taken precautionary measures by issuing alerts to their entire USA citizen traveling or residing abroad, since the attacks usually coincide with specific dates according to past experience.
These warnings against traveling are issued by the USA government, in the wake of the 10th anniversary of 9/11 along with the death of Al Qaeda leader Osama Bin Laden in May this year.
A heightened state of vigilance is in place in the USA, but the officials have urged traveling citizens to remain alert for any threats.