Biden Brussels bound as Ukraine war rages on

The president promises new sanctions and new diplomatic pressure on Vladimir Putin. Before leaving he warned that Russia using chemical weapons is a "real threat." We're in week four of the invasion and Putin's aerial assault is growing more indiscriminate by the day. We start today's coverage in Lviv with CNN's Phil Black. To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices