Hamza Shaban on how YouTube, Facebook and Twitter failed to stop the spread of a violent video from the Christchurch mosque shootings. William Booth with an update on Brexit. And Geoffrey Fowler on the costs of “free” tax-prep services.

How intelligence agencies grapple with the global reach of domestic terrorism

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.