The Orlando massacre at a popular gay nightclub shows no one yet has 'found the magic bullet' to prevent Americans from being inspired to violence by jihadist propaganda on the internet, US Attorney General Loretta Lynch said Tuesday as she visited a city still shaken by the shootings.

The FBI reversed itself and publicly issued a complete transcript of a 911 call from the Orlando nightclub shooter after coming under withering criticism from lawmakers for deleting references to the Islamic State group as well as the group's leader, Abu Bakr Al-Baghdadi.

Authorities believe terrorist Omar Mateen's wife knew about his plans to massacre innocents at a gay bar in Orlando, Florida ahead of time, but they are reluctant to charge her on that basis alone.

The two candidates' dramatically different proposals — as well as their contrasting styles — underscored the clear choice Americans face in the November election. Clinton's vision builds on President Barack Obama's approach, while Trump is calling for a drastically different national security posture.

The Islamic State (ISIS) terror organization has called the Orlando terrorist who murdered 49 club-goers in cold blood "one of the soldiers of the caliphate in America."