Infrastructure refers to the physical facilities and systems that will enable the functioning of a house or a country. In other words, infrastructure means the basic resources like buildings and personnel required for the smooth functioning of an event.
In the given statement,<em> "Atlanta Olympic planners were criticized for the lack of infrastructure"</em> suggests that the lack of suitable rooms, buildings, facilities, for the Olympics was lacking. And because of this lack of such infrastructures, the planners were criticized.
He said that he would overturn the treaty and raise Germany back up to an expansive empire. Joseph Stalin didn't want to expand because he already had too much land for his economy
It teaches others how things have changed over the years, like what it was back then and now. And what changed over time and how similar issues have been faced and solved.