1. Julia Rock [@jul1arock], reporter at the The Lever, and Allison Fisher [@citizenfisher], director of the Climate and Energy Program for Media Matters for America, on why the Ohio derailment was a foreseeable disaster and how dearth of early media coverage, which failed to hold parties accountable, left space for distrust. Listen.

2. Gönül Tol [@gonultol], the founding director of the Middle East Institute's Turkey program and author of "Erdoğan’s War: A Strongman’s Struggle at Home and in Syria," on the impact of government corruption on Turkey's death toll after this month's earthquake. Listen.

3. Natasha Hall [@NatashaHallDC], a senior fellow at the Middle East Program at the Center for Strategic and International Studies, on the ways politics have played into a delay in aid in Syria. Listen.

4. Keren Landman [@landmanspeaking], senior reporter covering public health and emerging infectious diseases at Vox, on the risks of bird flu and if we should be worried about another pandemic. Listen.

Music:Fallen Leaves - Marcos CiscarInvitation to a Suicide - John ZornBerceuse In D Flat Major, Op. 57 - Ivan MoravecTime Is Late - Marcos CiscarWhen Doves Cry Airborne Toxic EventLachrymae Antiquae - Kronos QuartetWhite Man Sleeps - Kronos QuartetThe Old House - Marcos Ciscar