Paragraph 2
 
 
						  
						  
Negotiators on 
 sides say the talks will be difficult and 
 side foresees any early breakthroughs. US President Joe Biden is 
 to re-engage with Iran and revive the nuclear 
. He hopes Iran will resume its compliance with the 2015 deal. US 
 Robert Malley said: "The primary issues to be discussed are actually quite simple. They are, on the 
 hand, the nuclear steps that Iran would need to take to return to compliance with the 2015 nuclear accord, and on the other hand, the sanctions-relief 
 that the United States would need to take." Iran said it is 
 to "reverse its remedial measures, which were taken 
 of the opposite side's 
 of the treaty."