Vice presidential nominee Tim Walz takes center stage tonight at the Democratic National Convention in Chicago. US government officials are hammering out the final details of a ceasefire proposal between Israel and Hamas. Divers recovered four bodies today in the search for those missing from a superyacht that sank off the coast of Sicily earlier this week. A deadly shooting inside a school in Bosnia is under investigation. And, new research looks at the impact a severe case of Covid-19 could have on your mental health.