Death In Training – Lesley Stahl investigates accidents involving military armored vehicles during training. 60 MINUTES found that more service members were killed in training accidents than in combat in recent years, and a large percentage of those accidents involved military vehicles: from Humvees to light armored vehicles to AAVs. Stahl reports on the causes and potential solutions. She speaks with parents who lost children in such accidents, a soldier who lost a limb in a rollover, and a company trying to prevent these incidents from happening. Breaking Point – Sharyn Alfonsi reports from Louisville, Ky., how record COVID-19 hospitalizations and critical staff shortages threaten the American health system just as 70 million aging Baby Boomers begin to require more care. Canada's Unmarked Graves – Last year, when archaeologists detected what they believed to be 200 unmarked graves at an old school in Canada, it brought new attention to one of the most shameful chapters of that nation's history. Anderson Cooper reports on the residential schools of Canada, where more than 150,000 indigenous children were sent after being forcibly removed from their communities.