JULIAN E. BARNES

The United States is investigating whether Iran was involved in the incident. Hours after the attack, two missiles were fired at the Navy ship involved...

The officials cautioned that their calculations could change as more intelligence surfaces.

F.B.I. officials say more than half of Chinese spying efforts aimed at stealing technology occurs in Silicon Valley.

Russian spy agencies and new technologies could be used to push conspiracy theories, U.S. officials say.

Officials say they have detected no launches of balloons since the United States shot down one in February, though they believe China is likely to...

The movie about the daring mission to rescue American diplomats from Tehran portrayed a single C.I.A. officer sneaking into the Iranian capital. In reality, the...

U.S. officials say they expect Ukraine to continue its attacks because they send a strong message: Kyiv can still strike back.

A newly declassified American intelligence analysis says Russian spy agencies are using influence laundering techniques to hide the Kremlin’s involvement in cultivating pro-Russia and anti-Ukraine...

U.S. officials say Chinese and Russian spy agencies are trying to steal technology from private American space companies and preparing cyberattacks that could disable satellites...

The hackers penetrated the accounts of senior State Department officials, including the U.S. ambassador to China.