The resignation of Tulip Siddiq

Donald Trump has fired his controversial US homeland security secretary, Kristi Noem, after weeks of bipartisan complaints about her leadership. As the public face of an aggressive immigration crackdown that prompted lawsuits and nationwide anti-ICE protests, Noem’s year-long tenure was plagued by multiple controversies, including accusing two US citizens killed by immigration agents of ‘domestic terrorism’. What exactly led to Noem’s firing and what do we know about her replacement? Nosheen Iqbal speaks to the Guardian US live news editor Chris Michael – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

As Chicago prepares to bid farewell to Jackson, Today in Focus hears about the groundbreaking civil rights activist from those who knew him. Help support our independent journalism at theguardian.com/infocus

Intense waves of airstrikes have hit dozens of military positions, frontier posts and police stations along northern parts of Iran’s border with Iraq in what appears to be preparation by the US and Israel for a new front in their war. Iran has warned ‘separatist groups’ in this region against joining the widening conflict and launched strikes against Iraq-based Kurdish groups it described as ‘opposed to the revolution’. Could the involvement of these militant groups increase the risk of a civil war in Iran if the regime collapses? Nosheen Iqbal speaks to deputy head of international news Devika Bhat – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

Rafael Behr on why Donald Trump’s war on Iran presents a strategic dilemma for Keir Starmer. Help support our independent journalism at theguardian.com/infocus

Global oil and gas prices have skyrocketed as war halts energy exports from the Middle East. The strait of Hormuz, a narrow passage of water that facilitates the shipping of about a fifth of the world’s oil, has been in effect closed since the regional war began, prompting fears of a global economic crisis. According to reports, traffic has dropped by about 80%, but how long until we feel the effects? Nosheen Iqbal speaks to the Guardian’s head of business, John Collingridge – watch on YouTube. Help support our independent journalism at theguardian.com/infocus