Trump's war on Iran: Shifting stories and unanswered questions

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.