national security

Silicon Valley entrepreneurs, Midwestern farmers and Wall Street investors all see China as a business opportunity. Yet in Washington, China is first and foremost a security threat.

The high-level talks come at a time when the U.S. and Mexico are dealing with an ongoing surge at their shared border.

The meeting between Gen. Mark Milley, chairman of the U.S. Joint Chiefs of Staff, and his Russian counterpart in Finland comes at a crucial time in the wake of the U.S. withdrawal from Afghanistan.

France said it was "unacceptable behavior" for Australia to abruptly drop a $40 billion submarine purchasing agreement with France in favor of a new deal with the U.S. and U.K.

The Australian navy will be able to patrol faster and farther with the submarine technology. The rare move comes as the United States looks for ways to counter China.

A new book, Peril, says the chairman of the Joint Chiefs of Staff was attempting to head off a potential armed conflict when he called his Chinese counterpart twice in Trump's final months in office.

After the attacks, barriers and thigh-high cement bollards sprouted up seemingly overnight in Washington, D.C. But new threats show the need for adaptability.

Just hours after the Sept. 11 attacks, President George W. Bush said, "The resolve of our great nation is being tested." So here we are 20 years later. Have we passed the test?

After the attacks on the World Trade towers and the Pentagon on Sept. 11, 2001, Marc Sasseville and his colleagues at the National Guard learned of a fourth hijacked plane — Flight 93 — still in progress.

No boarding pass or ID was needed to go to the gate, and 4-inch-blade knives were allowed aboard planes. Now we take off shoes, can't have liquids over 3.4 oz and go through high-tech body scanners.