"Berlin bomb suspect Jaber Albakr showed signs of radicalization in Germany, posting jihadi videos online before traveling to the Islamist-controled Syrian city of Idlib earlier this year, his brother told Reuters." "He went to Turkey seven months ago and spent two months in Syria. He called us and told us 'I'm volunteering with the White Helmets (emergency teams) in Idlib'." " (thanks Amir)