The US-Iran deal, serving as foundation for the ongoing talks in Switzerland , marks a crucial diplomatic achievement for Pakistan, perhaps the most significant in the country's modern history.  "Pakistan was not only able to effectively leverage its relations with Tehran and growing closeness to Washington but also its network of regional partners like Qatar, Saudi Arabia, and Turkey," Farwa Aamer, director of South Asia Initiatives at the Asia Society Policy Institute in New York, told DW. "