Trump warns Iran to get smart, as reports emerge that the US is preparing for a prolonged naval blockade. Also on East Asia Tonight, China vows to protect its interests in Panama, accusing Washington of politicising the use of ports. Meanwhile Australia's top diplomat is in China on the second leg of her East Asia tour. 00:00 Introduction 01:30 President Trump signals extended naval blockade 03:08 Australia FM Penny Wong in China for high-level talks 08:07 S Korean court hikes Yoon's sentence