National security expert Juliette Kayyem on the investigation into an explosion at a Harvard Medical School building over the weekend, and President Trump’s continued attacks on Venezuelan boats, even as the UN cites human rights violations. Plus, why he's threatening U.S. military action in Nigeria. Carol Rose of the ACLU of Massachusetts discusses the ACLU-led class action suit on behalf of detained immigrants who have been denied bond hearings. Plus, whether the U.S. supreme court will hand Trump yet another major victory on tariffs.  Michael Curry of the Mass League of Community Health Centers on the government shutdown, healthcare costs and remembering his friend, former Newton mayor Setti Warren. David Shapiro of the YMCA of Greater Boston on how the Y is meeting Boston’s food needs during the shutdown.   Alexander Smalls is an award-winning opera singer turned James Beard Award-winning cookbook author and chef. He joins us ahead of an event at Suffolk University.