I ll address narco issue first:
Illicit drug trade originates from #Afghanistan; is worth up 2 $70B yearly in #UK streets; up to $3 bill is invested back in region rest end up in western banks. 2/
Porous border is used 4 narco logistics/route.
Drugs cartel funds terrorism, & warlordism & mafias in border regions of 🇦🇫, 🇵🇰 & 🇮🇷; they have influence in weak state like 🇦🇫 & desperate elements in structures in Iran 🇮🇷 who do not want stringent border between 🇮🇷 & 🇵🇰.