Security bollards are credited with minimizing damage and casualties in the 2007 Glasgow Airport attack , and with preventing ramming in the 2014 Alon Shvut stabbing attack , leading the assailant to abandon his car and attack pedestrians waiting at a bus stop with a knife , after his effort to run them over was thwarted . However , Berlin 's police chief , Klaus Kandt , argued that bollards would not have prevented the 2016 Berlin attack , and that the required security measures would be " varied , complex , and far from a panacea "
2007 Glasgow Airport attack
2007 Glasgow Airport attack
Vehicle-ramming attack