Protests erupted in Ukraine on Thursday after Mykhailo Fedorov's removal - and now soldiers are also criticising the move.
Taking testosterone for non-medical reasons is strictly prohibited in the US military.
Hegseth says he is authorising hormone screening to ensure US troops "operate at your absolute best".
Targets hit include ballistic missile infrastructure, nuclear sites, and naval bases.
Sarah Rainsford explains how the war in Ukraine has changed the way conflicts are handled.
Students at NMITE in Hereford say the armed forces have been underfunded.
Military personnel in the Channel Islands are marking Armed Forces Week.
Renewed calls for forever chemical investigation following the release of historical site documents.
People are invited to join celebrations, including a military parade and aerial displays in Douglas.
