HANOI, Vietnam (AP) — President Joe Biden was wrapping up a visit to Vietnam on Monday, meeting with Vietnamese government officials and business leaders and spotlighting new deals and partnerships between the two countries. He'll also visit a Hanoi memorial honoring his late friend and colleague Sen. John McCain, who was held for more than five years as a prisoner during the Vietnam War .

Biden met with Prime Minister Phạm Minh Chính, who also accompanied Biden to a quick drop by at a meeting of business leaders. Biden also sat down with President Võ Văn Thưởng, who hosted the U.S. president for a formal state luncheon.

Biden spoke about strengthening Vietnam's semiconductor industry and his administration's commitment to an open Pacific.

“My message today is quite simple. Let’s keep it up," Biden told the CEOs. “We need to develop and drive our collaboration, We need to forge new partnerships.”

The prime minister also stressed the need to improve cooperation and said “the sky is the limit” for the expanding U.S.-Vietnam relationship.

“We truly wish to receive strong political commitment from the U.S. government including you, Mr. President, who has had great affection for Vietnam," the prime minister said.

Highlights of the major deals announced by the White House during Biden's first-ever visit to Vietnam include U.S.-based Boeing's $7.5 billion deal with Vietnam Airlines to buy about 50 aircraft and Arizona-based Amkor Technology's plans for a $1.6 billion factory in Bac Ninh Province.

The White House also said the administration would help “build Vietnamese capacity to fight regional and international transnational crime,” including targeting illegal, unreported and unregulated fishing. China has been locked in long-running territorial conflicts with Vietnam, along with the Philippines, Malaysia and Brunei, as Beijing claims waters in the other nations' exclusive economic zone.

Biden arrived in Vietnam on Sunday and met with Nguyễn Phú Trong, general secretary of the Communist Party of Vietnam. Trong formally announced Vietnam had elevated the U.S. to its highest diplomatic status, comprehensive strategic partner. Biden said the shift demonstrated how far bilateral relations had evolved from the “bitter past” of the Vietnam War.

At the same time, Biden insisted that his roughly 24-hour visit was not about trying to start a “cold war” with China but was part of a broader effort to improve global stability by building relationships throughout Asia, including with Vietnam, at a time of tensions with Beijing.

Biden was ending the trip at the John Sidney McCain III Memorial near where, as a 31-year-old Navy lieutenant commander, his Skyhawk dive bomber was shot down by the North Vietnamese.

McCain parachuted out of the plane and landed in a lake in Hanoi, North Vietnam. He broke both arms and a leg in the fall, was dragged from the water by an angry crowd, and was beaten and bayoneted.

The harrowing 1967 incident began a more than five-year ordeal that became the defining moment for the future Republican senator from Arizona and two-time presidential candidate.

After six weeks in the hospital, McCain, who had lost about one-third of his weight, was transferred to a prison cell. After a brief time with cellmates, McCain, the son and grandson of four-star admirals, began two years in solitary confinement in a 10-by-10 foot (3-by-3 meter) room.

At one point, McCain’s captors asked if he wanted to go home, but it was a trick question. The U.S. military’s code of conduct required prisoners to be released in the order they were detained. The North Vietnamese wanted to make a show of releasing McCain early as his father assumed command over the Pacific. McCain refused.

For four days after he refused release, McCain was beaten every two to three hours by 10 guards. Filled with thoughts of suicide, McCain broke and agreed to sign an anti-U.S. propaganda statement confessing to “black crimes.” He later wrote: “I had learned what we all learned over there: Every man has his breaking point. I had reached mine.”

It was the last time McCain would break. He refused to sign any other statements or meet with visiting American anti-war activists. Eventually, McCain was removed from solitary confinement and mingled with other U.S. prisoners of war. He was released on March 14, 1973.

McCain returned home, retired from the Navy in 1981, moved to Arizona and launched a political career. He was elected to the House in 1982 and to the Senate in 1986, where he and Biden were colleagues. Despite his experience in Vietnam, McCain became was a strong advocate of restoring diplomatic relations with the country that had so badly mistreated him.

He sought the Republican presidential nomination in 2000 and 2008, failing to capture it both times. He died of brain cancer in 2018. Biden delivered an emotional eulogy at McCain's funeral in Arizona.

On the way back to Washington, Biden was stopping at Joint Base Elmendorf-Richardson in Anchorage, Alaska, to address service members, first responders and their families to mark the 22nd anniversary of the Sept. 11, 2001 attacks on New York, Washington and Pennsylvania.