New clashes between Azerbaijan and Armenia have erupted over the control of Nagorno-Karabakh. The conflict, which has been going on for over three weeks, has devastated the region, killing hundreds of soldiers and dozens of civilians. Simon Ostrovsky reports from ground zero with support from the Pulitzer Center. A warning: some of the images seen are disturbing. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders