10. Pakistan
Due to the pretty strained relationship between India and Pakistan, border security and customs are very strict. Similarly to Kashmir which was mentioned before, Karachi is also located close to Indo-Pakistani border and the situation is so bad that flights between India and Pakistan were canceled. Karachi airport was also attacked by militants which additionally increased customs controls and airport security in general. In 2016, The Federal Board of Revenue (FBR) ordered increased number of border security officials in order to minimize chances of smuggling.
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