World News Roundup

On the "CBS News Weekend Roundup," host Allison Keyes gets the latest from Tracy Wholf on the massive changes made at the EPA this week amid a global battle against climate change. It's been five years since Covid-19 was declared a global pandemic - we'll take a look back. In the "Kaleidoscope with Allison Keyes" segment, a discussion about free speech versus antisemitism.Featured: Allison has a disturbing report on the decline in bird populations in the nation.