As U.S. and Israeli forces pounded Iran, and Tehran and its affiliates retaliated by firing missiles at targets across the Mideast on Monday, the international legal order was caught in the crossfire.

At the heart of the post-World War II global order — United Nations headquarters in New York — Secretary-General António Guterres told the Security Council on Saturday that U.S. and Israeli airstrikes violated international law, including the U.N. Charter. He also condemned Iran's retaliatory attacks for violating the sovereignty and territorial integrity of nations in the Mideast.

Officials in the Trump administration insist that the military campaign is a lawful measure to ensure Tehran does not build nuclear weapons. "It's a matter of global security. And to that end, the United States is taking lawful actions," Trump's U.N. ambassador, Mike Waltz, said.

Iranian Foreign Minister Abbas Araghchi wrote in a letter to the U.N. on Sunday that the killing of Supreme Leader Ayatollah Ali Khamenei "constitutes a grave and unprecedented breach of the most fundamental norms governing relations among States."

On Monday, Defense Secretary Pete Hegseth bullishly defended the U.S. military campaign. "No stupid rules of engagement, no nation building quagmire, no democracy building exercise, no politically correct wars. We fight to win and we don't waste time or lives," he said at the Pentagon.

The war with Iran comes less than two months after U.S. forces swooped into Caracas to capture former Venezuelan President Nicolás Maduro and fly him to New York to face justice.

David Crane, an American expert on international law and founding prosecutor of a United Nations court that prosecuted crimes in Sierra Leone, wrote in an analysis that U.S. attacks in Iran and Venezuela "highlight a dangerous trend: the normalization of unilateral force as a tool of foreign policy. Even when the outcome is positive, the violation of international law and constitutional limits sets a precedent that threatens global stability and undermines America's own legal foundations."

In Washington, many Democrats have called the strikes illegal. They argue that under the Constitution, only Congress has the power to declare war. They say the Trump administration failed to lay out its rationale or plan for the military strikes, and the aftermath.

Congress hurriedly scheduled a war powers debate for Monday over Trump's authority to bomb Iran.

The Supreme Court said that it will hear from oil and gas companies trying to block lawsuits seeking to hold the industry liable for billions of dollars in damage linked to climate change.

The conservative-majority court agreed to take up a case from Boulder, Colorado, among a series of lawsuits alleging the companies deceived the public about how fossil fuels contribute to climate change.

Governments around the country have sought damages totaling billions of dollars, arguing it's necessary to help pay for rebuilding after wildfires, rising sea levels and severe storms worsened by climate change. The lawsuits come amid a wave of legal actions in states including California, Hawaii and New Jersey and worldwide seeking to leverage action through the courts.

Suncor Energy and ExxonMobil appealed to the Supreme Court after Colorado's highest court let the Boulder case proceed. The companies argue emissions are a national issue that should be heard in federal court, where similar suits have been tossed out.

President Donald Trump's administration weighed in to support the companies and urge the justices to reverse the Colorado Supreme Court decision, saying it would mean every locality in the country could sue essentially anyone in the world for contributing to global climate change.

Trump, a Republican, has criticized the lawsuits in an executive order, and the Justice Department has sought to head some off in court.

Attorneys for Boulder had agued that the litigation is still in early stages and should stay in state court.

A man accused of killing 15 people in a mass shooting at a Jewish festival on Sydney's Bondi Beach appeared in court Monday for the first time since his release from the hospital.

Naveed Akram appeared in Sydney's Downing Center Local Court via a video link from the maximum security Goulburn Correctional Center 200 kilometers (120 miles) away.

He did not enter pleas to the charges against him, including murder and committing a terrorist act. The brief court appearance focused on extending a gag order that suppresses the identities of victims and survivors of the attack who have not chosen to identify themselves publicly.

Defense lawyer Ben Archbold told reporters outside court that Akram was doing as well as could be expected and it was too early to indicate any intention of pleas.

Akram, 24, was wounded and his father Sajid Akram, 50, was killed in a gunbattle with police after the attack on a Hanukkah celebration at the beach Dec. 14.

The younger Akram is next scheduled to appear in court April 9.

The police investigation is one of three official inquiries examining Australia's worst alleged terrorist attack and the nation's worst mass shooting in 29 years.

One involves the interactions between law enforcement and intelligence agencies before the attack that was allegedly inspired by the Islamic State group.

A royal commission, the highest form of public inquiry, will investigate the nature, prevalence and drivers of antisemitism generally as well as the circumstances of the Bondi shooting.