War Secretary Pete Hegseth recently blocked the promotions of several Navy officers who had been selected by a board of senior admirals to be promoted to one-star admirals. Hegseth, who has long ...

ASHBURN, Va. — With the new systems being put in place for the Washington Commanders, listening to players describe the experience so far is painting a picture of what could be the most aggressive ...

Egypt’s Pyramids of Giza were built to endure an eternity, but how remains one of the ancient world’s greatest mysteries. Here’s what archaeologists know. The Pyramids of Giza rise behind Egypt’s ...

Type IV secretion systems (T4SSs) comprise 12 protein components, VirB1–VirB11 and VirD4. VirB2 forms a pilus and is co-purified with VirB5. VirB4, VirB11 and VirD4 are ATPases powering pilus assembly ...