seconds

In another video verified by the BBC, Mr Kirk is seen speaking at the rally for around four seconds, before a single gunshot is heard.

It then "all changed dramatically and devastatingly within seconds", she said.

In June, he became the fifth-fastest British man over 400m hurdles, running 48.47 seconds in Prague to break his personal best and achieve the qualification standard for this month's World Championships.

For 13 terrifying seconds on 23 April this year, Turkey's largest city was shaken by a 6.2 magnitude earthquake.

When the season began earlier in the fall, I thought our top five runners could average a time of 14 minutes, 30 seconds, a pace of 4:40 per mile.