Trump took part in a moment of silence at the White House before traveling to the Pentagon's 9/11 memorial.
"We understood that John was looking at how we might be able to handle some conflicts with a more aggressive attitude", said the Governor, "now, no one knows it specifically, there's some talk it may have been the Taliban visit to Camp David, I don't believe that to be true".
Policemen keep watch as angry Afghan protesters burn tires and shout slogans at the site of a blast in Kabul, Afghanistan on September 3, 2019.
Donald Trump said he would award a medal to a retired Army colonel he credited with saving about 2,700 people at the World Trade Center during the September 11 terrorist attacks, as the president remembered the 18th anniversary of the incident.
The number of US troops peaked at around 100,000 but began to drop steadily after Bin Laden was killed in 2011.
As part of the proposed deal, the U.S. is required to withdraw 5,400 of its troops from Afghanistan within 20 weeks of the signing of the agreement.
Khalilzad has said the first 5,000 US troops would withdraw from five bases in Afghanistan within 135 days of a final deal.
Officials said there was fighting in at least 10 provinces, with the heaviest clashes in the northern regions of Takhar, Baghlan, Kunduz and Badakhshan, where the Taliban have been pressing security forces for weeks.
"It looks to me as if this one wasn't quite there", she said. I want to talk to these Taliban negotiators. "As far as I'm concerned they're dead".
Relations between the USA and the Taliban took a hit on Monday after Donald Trump scrapped negotiations aiming to secure a ceasefire in Afghanistan.
For the first time, more Afghan civilians have been killed by global and Afghan forces than by the Taliban and other insurgents, the United Nations said of the first three months of this year, with thousands more wounded by insurgent attacks.