The Pentagon is sending more US Marines to the Middle East as the war with Iran escalates and widens  -  Professor Robert Pape explains how the US is falling into an "escalation trap".

Economist Stephen Koukoulas on how the oil shock is hitting the Australian economy and whether the government may use the crisis to bring forward economic reform.

Andrew Day from The American Conservative, on how the decision to go to war is dividing President Trump's MAGA support base. 

How weight loss drugs are changing the world and might they become available to adolescents?

Plus the ABC's Annabel Crabb on the South Australian election.