Britain's King Charles III and Queen Camilla arrive at Joint Base Andrews, Maryland, on April 27, 2026. King Charles III arrives in Washington Monday for a high-stakes state visit aimed at salvaging Britain's frayed ties with Donald Trump, amid extra-tight security following an attack on a gala dinner attended by the US president. Tensions over the Iran war have rocked the so-called "special relationship" ahead of a trip that was meant to mark the United States' 250th anniversary of independence from the British monarch's ancestors. (Photo by HENRY NICHOLLS / POOL / AFP via Getty Images)

People wave flags as they rally in support of Iran's supreme leader Ayatollah Mojtaba Khamenei at Sadeghyeh Square in Tehran on April 27, 2026. Iran's top diplomat blamed Washington on April 27 for the failure of Middle East peace talks during a visit to Russia, where President Vladimir Putin promised him Moscow's support in ending the war. (Photo by ATTA KENARE / AFP via Getty Images)

A woman waves an Iranian flag during a rally in support of Iran's supreme leader Ayatollah Mojtaba Khamenei at Sadeghyeh Square in Tehran on April 27, 2026. Iran's top diplomat blamed Washington on April 27 for the failure of Middle East peace talks during a visit to Russia, where President Vladimir Putin promised him Moscow's support in ending the war. (Photo by ATTA KENARE / AFP via Getty Images)

Britain's King Charles III and Queen Camilla are greeted by US Protocol Chief Monica Crowley as they arrive at Joint Base Andrews, Maryland, on April 27, 2026. King Charles III arrives in Washington Monday for a high-stakes state visit aimed at salvaging Britain's frayed ties with Donald Trump, amid extra-tight security following an attack on a gala dinner attended by the US president. Tensions over the Iran war have rocked the so-called "special relationship" ahead of a trip that was meant to mark the United States' 250th anniversary of independence from the British monarch's ancestors. (Photo by Henry Nicholls / POOL / AFP via Getty Images)

People wave flags as they rally in support of Iran's supreme leader Ayatollah Mojtaba Khamenei at Sadeghyeh Square in Tehran on April 27, 2026. Iran's top diplomat blamed Washington on April 27 for the failure of Middle East peace talks during a visit to Russia, where President Vladimir Putin promised him Moscow's support in ending the war. (Photo by ATTA KENARE / AFP via Getty Images)

A man carries an Iranian flag with the portraits of Iran's late supreme leader, Ayatollah Ruhollah Khomeini (L), slain supreme leader Ayatollah Ali Khamenei (C) and Iran's supreme leader Ayatollah Mojtaba Khamenei as people rally in his support in Sadeghyeh Square in Tehran on April 27, 2026. Iran's top diplomat blamed Washington on April 27 for the failure of Middle East peace talks during a visit to Russia, where President Vladimir Putin promised him Moscow's support in ending the war. (Photo by ATTA KENARE / AFP via Getty Images)

Britain's King Charles III and Britain's Queen Camilla walk past an honor guard upon arrival at Joint Base Andrews, Maryland, on April 27, 2026. King Charles III arrives in Washington Monday for a high-stakes state visit aimed at salvaging Britain's frayed ties with Donald Trump, amid extra-tight security following an attack on a gala dinner attended by the US president. Tensions over the Iran war have rocked the so-called "special relationship" ahead of a trip that was meant to mark the United States' 250th anniversary of independence from the British monarch's ancestors. (Photo by Kent NISHIMURA / AFP via Getty Images)

Britain's King Charles III and Queen Camilla are greeted by US Protocol Chief Monica Crowley as they arrive at Joint Base Andrews, Maryland, on April 27, 2026. King Charles III arrives in Washington Monday for a high-stakes state visit aimed at salvaging Britain's frayed ties with Donald Trump, amid extra-tight security following an attack on a gala dinner attended by the US president. Tensions over the Iran war have rocked the so-called "special relationship" ahead of a trip that was meant to mark the United States' 250th anniversary of independence from the British monarch's ancestors. (Photo by Henry NICHOLLS / POOL / AFP via Getty Images)