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Experts inside and outside the Biden administration fear that Iran may conclude it has only one defense left: racing for an atomic weapon. When Israeli fighter jets roared off the [...]

The Ukrainian president gave no reason, but there are indications that friendly fire may have brought down the jet, a Western official said. President Volodymyr Zelensky of Ukraine dismissed the [...]

A case that had mostly drifted from public consciousness in 12 years of proceedings is back in the spotlight and no closer to trial. In the space of three days [...]

Ukraine wants to deploy its first F-16 jets this summer, hoping to counter Russia's dominance in the air. But stepped-up Russian bombing attacks on air bases complicate the effort. The [...]

Russia's defense minister said he needed to talk to Defense Secretary Lloyd Austin about an alleged Ukrainian operation. What happened next remains murky. Earlier this month, Defense Secretary Lloyd J. [...]

The men were arrested after the F.B.I. quietly began an investigation that stretched across the country and involved scores of bureau personnel. When eight Tajik men sought asylum at the [...]

The sabotage, which analysts said marked an escalation in the shadow war between Israel and Iran, caused sweeping disruption in several provinces. Israel carried out covert attacks on two major [...]

The attack on Sunday killed three Army reservists, the first known American military deaths from hostile fire in the turmoil spilling over from Israel's war with Hamas. Air defenses failed [...]

The independent review will be conducted in addition to assessments by the defense secretary’s chief of staff and the White House after top officials were not notified of the episode [...]

Defense Secretary Lloyd J. Austin ordered the assessment after accusations that an Air National Guardsman disclosed sensitive information. The Pentagon's security and oversight measures have failed to keep pace with [...]

Yevgeny Prigozhin, the head of Wagner, may have believed he had support in Russia's military. A senior Russian general had advance knowledge of Yevgeny Prigozhin's plans to rebel against Russia's [...]

The column of Bradley armored vehicles rumbled forward, filled with Ukrainian soldiers, bringing a new and potent American weapon to the war's southern front. But then one hit a mine. [...]

The air force said it intercepted the hypersonic missile with a newly delivered U.S.-made Patriot air-defense battery. U.S. officials confirmed the strike. An American-made Patriot air-defense missile successfully intercepted one [...]

Thirteen U.S. service members and scores of Afghan civilians died in the bombing as the United States was evacuating in August 2021. WASHINGTON -- The Taliban have killed the leader [...]

The Air Force also announced actions focused on security protocols following the arrest of an Air National Guardsman accused of posting classified documents online. WASHINGTON -- The Pentagon on Tuesday [...]

Some in Ukraine even welcomed the disclosures as confirming what they have been saying for months -- that its forces desperately need more weapons and munitions. In the leaked American [...]

The arrest of Jack Teixeira, a junior Massachusetts airman, in the leaking of classified documents opens a debate about security clearances. WASHINGTON -- Why would a 21-year-old national guardsman be [...]

A large number of people potentially had access to the Pentagon intelligence documents posted on social media. WASHINGTON -- A surprisingly large number of people potentially had access to the [...]

A large number of people potentially had access to the Pentagon intelligence documents posted on social media. WASHINGTON — A surprisingly large number of people potentially had access to the [...]

The Pentagon is leading a separate team, including the White House, State Department and intelligence agencies, to determine the extent of the damage caused by the disclosures. The Pentagon said [...]

Classified documents detailing secret American and NATO plans have appeared on Twitter and Telegram. WASHINGTON -- Classified war documents detailing secret American and NATO plans for building up the Ukrainian [...]

Classified documents detailing secret American and NATO plans have appeared on Twitter and Telegram. WASHINGTON — Classified war documents detailing secret American and NATO plans for building up the Ukrainian [...]

U.S. officials said the main air defense system at the coalition base was ''not fully operational'' at the time of Thursday's attack, which killed a U.S. contractor and wounded six [...]

Jeffery Woodke, an aid worker abducted in Niger by militants, was released after more than six years in captivity. A second hostage was also released: Olivier Dubois, a French journalist [...]

The 42-second clip shows two Russian fighters spraying the American aircraft with a substance the Pentagon says is jet fuel. WASHINGTON -- The Pentagon's European Command on Thursday released the [...]

''Intercepts'' are common, but statements issued after the encounter in the Black Sea this week suggest that Russia's actions were unusual. WASHINGTON -- Defense Secretary Lloyd J. Austin III on [...]

The Biden administration is looking into mysterious U.F.O. encounters and pushing back against China over accusations of widespread espionage. WASHINGTON -- Tensions between the United States and China escalated on [...]

Bilal al-Sudani's financing of the ISIS branch in Afghanistan that killed 13 U.S. troops in 2021 elevated him on U.S. kill-or-capture lists. WASHINGTON -- Bilal al-Sudani was no stranger to [...]

U.S. officials say the operation may be a signal by Russia that the country and its proxies could carry out more terrorist actions in Europe if nations continue supporting Ukraine. [...]

U.S. officials say they do not believe that Russia has decided to detonate a tactical device, but concerns are rising. President Vladimir V. Putin of Russia began ramping up his [...]

Top officials from the United States, Britain and France cautioned that there was no change in Russia's nuclear posture and that they believed no decision had been made to use [...]

A nighttime raid and a drone strike killed three men whose activities included recruiting fighters and plotting attacks, according to American and Syrian Kurdish officials. U.S. Special Operations forces carried [...]

A new intelligence assessment of the Al Qaeda threat was prepared after a drone strike killed Ayman al-Zawahri, the group's leader. But some outside counterterrorism specialists said it was overly [...]

The help that sank the Moskva, the most significant loss by any navy in 40 years, is part of an administration effort providing real-time battlefield intelligence to Ukraine. WASHINGTON -- [...]

The inquiry also found shortcomings in the sharing of intelligence before the deadly assault by the Shabab in 2020. WASHINGTON -- A series of security lapses and an ''inadequate focus'' [...]

The suicide bombing killed as many as 170 civilians and 13 U.S. troops in the final days of U.S. military involvement in Afghanistan. A single Islamic State suicide bomber carried [...]

President Biden said the attack on Abu Ibrahim al-Hashimi al-Qurayshi was designed to minimize civilian casualties, but then the terrorist leader set off a bomb. A risky predawn raid by [...]

A new directive outlines steps intended to change how commanders think about their jobs, after New York Times investigations into botched airstrikes. WASHINGTON -- Defense Secretary Lloyd J. Austin III [...]

Near the height of the war against the Islamic State in Syria, a sudden riot of explosions rocked the country's largest dam, a towering, 18-story structure on the Euphrates River [...]

The New York Times obtained footage of the botched strike in Kabul, whose victims included seven children, through a Freedom of Information Act lawsuit. WASHINGTON -- Newly declassified surveillance footage [...]

The suicide bomber who killed nearly 200 people, including 13 U.S. troops, had been freed from prison by the Taliban days before the attack. WASHINGTON -- Four months after an [...]

The commander and second in charge of the U.S.S. Montgomery were relieved of command in a rare punishment, reportedly over their handling of a sexual harassment case. WASHINGTON -- The [...]

The military initially defended the strike, which killed 10 civilians including seven children, but ultimately called it a tragic mistake. WASHINGTON -- None of the military personnel involved in a [...]

The decision follows a New York Times investigation that described allegations that top officials had sought to conceal civilian casualties. Defense Secretary Lloyd J. Austin III on Monday ordered a [...]

A Times investigation found that dozens of women and children were killed in the bombing, which the military sought to conceal. WASHINGTON -- Defense Secretary Lloyd J. Austin III has [...]

The military never conducted an independent investigation into a 2019 bombing on the last bastion of the Islamic State, despite concerns about a secretive commando force. In the last days [...]

The Pentagon's latest admission illustrates the botched intelligence behind the strike that mistakenly killed 10 civilians in August. WASHINGTON -- The U.S. military has not located a suspected Islamic State [...]

An investigation of the Aug. 29 airstrike, which mistakenly killed 10 civilians, including seven children, did not recommend any disciplinary action. WASHINGTON -- Surveillance videos showed the presence of at [...]

One of the most senior ISIS leaders ever to be taken alive is now reported to be in custody. The U.S. had offered a reward of up to $5 million [...]

Lloyd J. Austin III's testimony before a House panel shed light on an apparent discrepancy about the advice President Biden said he had gotten from top military advisers. WASHINGTON -- [...]