U.S. President Barack Obama and writer/chef/host Anthony Bourdain met up in Vietnam.

Bourdain was in the country filming for his CNN show Parts Unknown, while Obama was on his Asian trip, with an agenda of ending a decades-long U.S. arms embargo on Vietnam, it’s former enemy.

“Their conversation will be featured in an upcoming episode of Anthony Bourdain Parts Unknown, returning for its eighth season in September,” said a spokesperson from CNN. “Bourdain will explore the purpose of the President’s trip and his interest in the people, food and culture of Vietnam.”

The two had bun cha, a popular Hanoi dish that’s made of grilled pork, rice vermicelli, herbs, and a tangy dipping sauce. After the dinner, Obama tweeted: “Total cost of bun Cha dinner with the President: $6.00 . I picked up the check . #Hanoi.”

Obama will conclude his Asian trip with a trip to Hiroshima, Japan, where the U.S. dropped the two atomic bombs in 1945, during World War II. He will be the first sitting U.S. president to visit the site.

“As with all our defense partners, sales will need to still meet strict requirements, including those related to human rights,” the president said in a news conference with Vietnamese President Tran Dai Quang.

“But this change will ensure that Vietnam has access to the equipment it needs to defend itself and removes a lingering vestige of the Cold War. It also underscores the commitment of the United States to a fully normalized relationship with Vietnam, including strong defense ties with Vietnam and this region for the long term.”