WASHINGTON (AP) — President Donald Trump claimed Monday he could end the nearly two-decade old war in Afghanistan in a matter of days, but it would kill millions of people and wipe the country “off the face of the earth.”

The president made the statement at the White House as he praised Pakistan Prime Minister Imran Khan and sought his help in negotiating a peace deal in neighboring Afghanistan.

“I could win that war in a week. I just don’t want to kill 10 million people,” Trump told reporters in the Oval Office. “If I wanted to win that war, Afghanistan would be wiped off the face of the earth. It would be gone. It would be over, literally, in 10 days.”

Warming up to Khan marked a turnaround for Trump, who has been sharply critical of Pakistan and now hopes Khan’s government will use its influence with the Taliban to advance a peace deal and help the U.S. withdraw from the nearly two-decade old war.

The war began when the U.S. went after al-Qaida leader Osama bin Laden and his Taliban supporters in Afghanistan following the Sept. 11, 2001, terrorist attacks. Sitting alongside Khan, Trump said he wanted a peaceful resolution. “So we’re working with Pakistan and others to extricate ourselves.”

The pleasantries in the Oval Office were an abrupt change from when Trump cut millions of dollars in aid to Pakistan, saying the only thing it offered the United States was “lies” and “deceit.”

Khan has bashed Trump too, but now says Pakistan is also eager to work to end the war. The U.S. wants Pakistan to use its leverage to get the Taliban to agree to a ceasefire, negotiate with the Afghan government and stop harboring militant groups.

Sen. Lindsey Graham, R-S.C., who sat in on the meeting, said, “Peace with honor and dignity in Afghanistan is only possible with the complete buy-in of Pakistan.”

“If the Taliban are denied sanctuary in Pakistan, this war will end quickly and on our terms,” Graham said, adding that he thinks Pakistan’s leaders are ready for change. “It is my hope that we can negotiate a free trade agreement between the United States and Pakistan, which would be of mutual economic benefit and an incentive to maintain stability in the region.”

U.S. envoy Zalmay Khalilzad has been holding talks with the Taliban for months, but so far the militant group has refused to talk directly to the Afghan government. There has been no let-up in terrorist attacks during the U.S.-Taliban talks.

“It’s the closest we’ve been to a peace deal,” Khan told Trump. “And I hope in the coming days we will be able to urge the Taliban to speak to the Afghan government and come to a political solution.”

Trump’s casual comments about wiping Afghanistan off the map will likely unsettle Afghans, who have fought against the Taliban alongside their U.S. and NATO partners for years. Afghans also are wary of Pakistan’s involvement in their country’s future.