WASHINGTON — Defense Secretary Pete Hegseth’s younger brother is serving in a key position inside the Pentagon as a Department of Homeland Security liaison and senior adviser, Hegseth's office confirmed. The high-profile job has meant meetings with a UFC fighting champion, a trip to Guantanamo Bay and, right now, traveling on the Pentagon's 747 aircraft as Hegseth makes his first trip as defense secretary to the Indo-Pacific. Phil Hegseth's official title is senior adviser to the secretary for