Pentagon Approves Gender-Reassignment Surgery for Service Member

The surgery was the latest setback to President Trump’s effort to bar transgender people from serving in the military.

Trump Plans for Nuclear Arsenal Require $1.2 Trillion, Congressional Review States

The report from the Congressional Budget Office was an authoritative accounting of the cost of rebuilding a nuclear arsenal that relies on Cold War-era technology.

No Need to Update 9/11 War Law, Trump Officials Tell Congress

Two top Trump administration officials urged Congress not to mess with a 16-year-old law that authorized the war against Al Qaeda — or at least to impose no new limits.

Pentagon Memo: Mattis Shows How to Split With Trump Without Provoking Him

The secretary of defense has been deft at leveraging the president’s respect for him into room to maneuver on his policy goals.

Mattis Leaves the Door Open to Military Options in North Korea

The defense secretary also said the United States had not shot down any missiles so far because they did not directly threaten American territory or allies.

C.I.A. Wants Authority to Conduct Drone Strikes in Afghanistan for the First Time

The C.I.A. is pushing for expanded powers to carry out its own drone strikes, and the White House is said to favor the proposal despite Pentagon objections.