Two people have been arrested on suspicion of arson at Dusseldorf Messe in western Germany. Hall 18 of the convention centre site, housing asylum seekers, was destroyed in the fire. Thirty migrants were treated for smoke inhalation and more than 200 were evacuated from the hall after the blaze on 7 June. Damage at the hall, which is close to the airport, has been estimated at 10m euros (US$11m). Initial reports speculated tha...