FBI releases more details on how New Orleans attacker planned his rampage

Authorities piece together timeline of radicalization of Shamsud-Din Jabbar, the US army veteran behind the attack

Before plowing a pickup truck into a crowd of New Year's revelers in New Orleans and killing 14 people, the man who carried out the Islamic State group-inspired attack had researched how to access a balcony on the city's famed Bourbon Street and looked up information about a similar attack at a Christmas market in Germany, the FBI said.

Nearly two weeks after Shamsud-Din Jabbar's rampage, the FBI continues to uncover new information detailing the extensive planning by the 42-year-old US army veteran who scouted out the area multiple times in the months leading up to the attack. Authorities have also been piecing together a timeline of his radicalization.