In the lead up to the 28 February strikes on Iran, President Donald Trump and his administration signalled that an attack was imminent. Since then, the president and his top officials have offered varying explanations for its actions in the war with Iran. The BBC's Analysis Editor Ros Atkins takes an in-depth look at how the Trump administration's narrative on the war with Iran has shifted, and the key questions that remain unanswered. Iran has targeted the US Navy base in Bahrain, highlighting gaps in air defences, which could worry Washington and its allies in the region. US Secretary of Defense Pete Hegseth offered few details about the operation, leaving questions unanswered about the scope or duration. The US says six of its F-15 jets were "mistakenly shot down by Kuwaiti air defenses", with all crew in a stable condition. Donald Trump warned of more US deaths after three US service members have been killed in action on the second day of US-Israel attack on Iran.…