New: US efforts to pressure Iran's neighbors to close their borders have so far failed, with Turkey, Iraq and Pakistan resisting Washington's demands.
Turkey has largely refused to change its border policy, while Iraq has rejected US requests to close all but two crossings.
The resistance has thwarted Washington's efforts to tighten its economic blockade on Iran, prompting the Trump administration to launch the Iron Gate Task Force on Cross-Border Trafficking and Smuggling.
Source: NYT