US approval for Ukraine long-range missile strikes into Russia is a slim lifeline for Kyiv

Two months before leaving office, US President Joe Biden has lifted restrictions preventing Kyiv from using the Army Tactical Missile System (ATACMS) for strikes deep into Russian territory that could help defend its territorial gains in Russia's Kursk region. Today, Ukraine launched the US-made missiles onto Russian soil for the first time. Here's what you need to know about the long-range ballistic missiles.