Footage verified by the BBC shows the wreckage of a Saudi F-15 fighter jet which the Iran-backed Houthi group says it shot down over Yemen. BBC Verify was able to pinpoint the crash site to an isolated location in the hills west of the Yemeni city of Marib. The long-running conflict between a Saudi-led military coalition and the Houthis has escalated in the last week after the armed group launched an offensive against pro-government forces. This led to the Houthis seizing key territory near the south-west coast, close to vital international shipping channels in the Bab al-Mandab strait. In one...