article_snippet: At 10.29am the flight radar monitors the plane descending.
article_snippet: At 10.30am 10.30am is down by 316ft, and just a minute later, 10.30am is down 1,800ft.
article_snippet: At 10.32am air traffic controllers try to contact the aircraft, but get no response.
article_snippet: 10.01am: Plane takes off from Barcelona 26 minutes late .
article_snippet: : Plane begins its descent .
article_snippet: 10.42am: French air navigation service sends out search and rescue teams .