A flotilla carrying humanitarian aid and activists, including Swedish climate campaigner Greta Thunberg, left Barcelona on Sunday vowing to try to "break the illegal siege of Gaza", organisers said. However, fierce winds forced the vessels to return to the Barcelona port, where the activists will wait for the storm to pass. Interested in licensing this video? Get in touch 👉 http://u.afp.com/wvnD AFP’s services and content are for professional use only.