In the wake of the terror attack in Brussels that killed 32 people, this week’s Nuclear Security Summit in Washington is expected to end up focusing on concerns over terrorists obtaining nuclear materials.
For the more than 50 world leaders in attendance, the concern isn’t simply whether ISIS can get a nuclear weapon, but also whether terror groups are exploring a "dirty bomb," which is a weapon that combines radioactive material with conventional explosives.
Thursday morning, President Obama met with Asian leaders ahead of the two-day summit to discuss North Korea’s nuclear threat. Here & Now's Meghna Chakrabarti speaks with NPR White House correspondent Scott Horsley.
This segment aired on March 31, 2016.