The British royals' visit follows a 2025 trip to Saudi Arabia by Britain's finance minister, which London said had unlocked trade and investment agreements worth 6.4 billion pounds ($8.71 billion).
"We believe our mom is still out there," Guthrie, host of NBC's "Today" morning show, said. "We need your help. She was taken, and we don't know where."
Both countries join Saudi Arabia and the United Arab Emirates in criticizing Israel's plan to expand control over the West Bank.
US Vice President JD Vance addressed Iran negotiations, saying the president is keeping decisional space while human rights remain a key part of the talks.
The woman had been arrested in 2024 while participating in a pro-Palestinian rally at Columbia University.
The British prime minister is facing increased calls from senior Labour Party officials to step down following recent revelations from the Epstein Files.
The move is in keeping with US President Donald Trump's demands that European nations take more responsibility for their own security.
The leaders are set to discuss the current US-Iran talks, as well as the potential for military action.
NATO defense ministers are expected to approve an Arctic Sentry mission this week, aiming to strengthen the alliance’s presence in the region amid Greenland disputes.
"Overnight, US military forces conducted a right-of-visit, maritime interdiction and boarding on the Aquila II without incident," Hegseth wrote in a post on X/Twitter. "It ran, and we followed."
Protesters argued the policy has instead slowed trade, creating congestion at Umm Qasr port and prompting some importers to consider routing goods through the Kurdistan region, where fees are lower.
