GENEVA (AP) President Joe Biden and Russian President Vladimir Putin concluded their summit on Wednesday with an agreement to return their nations ambassadors to their posts in Washington and Moscow and a plan to begin work toward replacing the last remaining treaty between the two countries limiting nuclear weapons.

But the two leaders offered starkly different views on difficult simmering issues including cyber and ransomware attacks originating from Russia.

Putin insisted anew that his country has nothing to do with such attacks, despite U..S. intelligence that indicates otherwise. Biden, meanwhile, said that he made clear to Putin that if Russia crossed certain red lines including going after major American infrastructure his administration would respond and the consequences of that would be devastating.