Michael Scherer on why Julián Castro is the only 2020 Democrat with an immigration plan. Emily Rauhala on Yazidi refugees in Canada. And Joel Achenbach on the first picture of a black hole.

The U.S. case against WikiLeaks founder Julian Assange

Post Reports is the daily podcast from The Washington Post. Unparalleled reporting. Expert insight. Clear analysis. Everything you’ve come to expect from the newsroom of The Post, for your ears. Martine Powers and Elahe Izadi are your hosts, asking the questions you didn’t know you wanted answered. Published weekdays around 5 p.m. Eastern time.