The photo below was taken after the battle for control of the central radio station in Prague, which left seventeen dead and five wounded. The image shows the extensive damage caused by the invasion.
Source:
Jaromír Navrátil et al, eds., The Prague Spring 1968: A National Security Archive Documents Reader, translated by Mark Kramer, Joy Moss, and Ruth Tosek (Budapest: Central European University Press, 1998), np. Copyright The Prague Spring Foundation, Prague, 1998.