'Man in the hat'

Mohamed Abrini, widely known as the 'Man in the hat' failed to detonate his suicide bomb at the airport. He was identified later from the video footage of the attack. Abrini fled on foot back to central Brussels where he disappeared. The 32-year-old, who grew up in the gritty Molenbeek district of Brussels, was a childhood friend of Salah Abdeslam, the only survivor of the Paris jihadist team.