This guy (John Smeaton) is great, it's video of an interview with one of the Glasgow Airport workers involved with Saturday's security alert. Warning: some people might need subtitles :O)
About 20 secs in: "...the man then attacked the policeman, I thought 'That's not right'..."
Then about a minute and ten in: "...what's the score, y'know, we've got to go and get this sorted...'
http://www.bbc.co.uk/mediaselector/check/player/nol/newsid_6250000/newsid_6257700?redirect=6257792.stm&news=1&nbram=1 &bbwm=1&bbram=1&nbwm=1