Extremely rare in the west in 2019. Not rare in some other parts of the world with an unstable security situation. They were also common in the UK in the 90s an

Extremely rare in the west in 2019. Not rare in some other parts of the world with an unstable security situation. They were also common in the UK in the 90s and earlier during the troubles, so it's not like western countries are magically immune from instability.