Samantha Power participates in a ceremonial swearing-in with US vice-president Kamala Harris at the White House complex in Washington, DC. Photograph: Al Drago/The New York Times

Former US ambassador to the UN Samantha Power paid tribute to vice-president Kamala Harris as Ms Power was sworn in as the new head of the United Stat(...)

US president Joe Biden speaks from the Treaty Room in the White House, in Washington, DC, about the withdrawal of the remainder of US troops from Afghanistan. Photograph: Andrew Harnik/Pool/EPA

US president Joe Biden has announced a plan to withdraw all remaining US troops from Afghanistan, formally ending the 20-year, largely unsuccessful Am(...)

Television screens show file footage of North Korea’s missile test. Photograph: Jung Yeon-je/AFP via Getty

North Korea has conducted its second significant weapons test in the past week, raising one of the first big foreign policy challenges for President J(...)

Taoiseach Micheál Martin and US president Joe Biden hold a virtual bilateral meeting, as seen at the White House on St Patrick’s Day. Photograph: Jim Watson/AFP via Getty Images

US president Joe Biden underlined his “strong support” for the Belfast Agreement on Wednesday as he held his first bilateral meeting with Taoiseach Mi(...)

A sophisticated attack on Microsoft’s widely used business email software is morphing into a global cybersecurity crisis, as hackers race to infect as many victims as possible .

A sophisticated attack on Microsoft’s widely used business email software is morphing into a global cybersecurity crisis, as hackers race to infect as(...)

President Joe Biden signs documents  in the President’s Room at the US Capitol after the inauguration ceremony on Wednesday. Photograph:  Jim Lo Scalzo/Pool Photo via AP

As Joe Biden enters the White House as president, a new era has begun in the United States. After four years of turmoil, controversy and national divi(...)

Dublin-born Samantha Power, the former US ambassador to the United Nations, will head up USAid, America’s main federal aid agency. Photograph: Don Emmert/AFP via Getty Images

Throughout his almost 50-year career in politics, Joe Biden has often recalled the words of his grandmother. “Remember, Joey Biden, the best drop of b(...)

Samantha Power said she felt ‘immensely fortunate to have the chance to serve again, working with the incredible USAID team to confront Covid-19, climate change, humanitarian crises, and more.’ File photograph: Don Emmert/AFP via Getty Images

Former US ambassador to the United Nations Samantha Power has been nominated by president-elect Joe Biden to lead USAid, the government’s top developm(...)

French president Emmanuel Macron attends a video conference along with Chinese president Xi Jinping, German chancellor Angela Merkel, European Commission president Ursula von der Leyen and president of the European Council Charles Michel to conclude a business investment deal. Photograph: Sebastien Nogier/pool via AP

The EU and China have announced a long-awaited deal on an investment treaty, in a move that is aimed at opening up lucrative new corporate opportuniti(...)

The Pentagon warned earlier this month that Russian state-sponsored hackers were targeting a vulnerability that allowed them to access government networks. Photograph: iStock

The US has issued an emergency warning after it emerged that nation-state hackers had managed for several months to weaponise software used by almost (...)

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