Ongoing investigations into the Halle attack have so far concluded that the right-wing extremist attacker acted alone. But "lone wolves" are anything but isolated. By Sandra Petersmann and Naomi ConradMore
Each year, thousands of people travel to the Turkish city of Konya to attend a week-long series of events and ceremonies that mark the death of the 13th-century Islamic poet, scholar and Sufi mystic Jalaladdin Rumi. By Francisco Seco
