When you approaching airport or train station security theater, you slowing down due to limited throughput. And then bang! - a terrorist blows up in the crowd r

When you approaching airport or train station security theater, you slowing down due to limited throughput. And then bang! - a terrorist blows up in the crowd right in front of security gate. https://en.m.wikipedia.org/wiki/December_2013_Volgograd_bombings#Train_station_bombing_on_29_December https://en.m.wikipedia.org/wiki/December_2013_Volgograd_bomb...