President Volodymyr Zelenskyy considers the North Atlantic Treaty Organization (NATO) security guarantees for Ukraine the cheapest for Ukraine, Europe, the US

Ukraine’s President Zelenskyy asked whether the US saw NATO as being necessary as he addressed the World Economic Forum in Davos. Leaders from China, Ukraine and Germany have taken the stage on day one.

Leaders of some of the world's largest economies are in Davos, Switzerland, this week for the annual World Economic Forum. President Trump will address attendees Thursday via a live video feed. CBS News national security contributor Samantha Vinograd has more from Davos.

President Volodymyr Zelensky met leading American and European executives and business leaders at the World Economic Forum in Davos, Switzerland, on Jan. 22, emphasizing Ukraine's investment potential and the importance of international support in achieving a just peace.

A day before the World Economic Forum (WEF) was scheduled to start in Davos, the highest town in Europe has turned into a fortress with the deployment of 5,000 Swiss army personnel.

Spain is a "reliable partner" in NATO, Prime Minister Pedro Sanchez said on Wednesday, after U.S. President Donald Trump criticised Madrid for falling short on its financial

Among the issues likely to be explored at the World Economic Forum this week is the future of Ukraine and its impact on Europe.

The five-day meeting beginning January 20 will explore how to re-launch growth, harness new technologies and strengthen social and economic resilience,” the WEF has said.

The world is closely watching U.S. President Donald Trump's return to the White House as he begins his second term. His inauguration coincided with a high-profile gathering of some of the world's most influential leaders.

The issue of NATO depends on the United States, if President Donald Trump is ready to see Ukraine in NATO, it will be in NATO, Ukrainian President Volodymyr Zelenskyy said.

Europe must establish itself as a strong global player in the Trump era, warns Zelensky in a room of world leaders at Davos