Ten people, including one Boulder police officer, were killed at King Soopers in the city Monday. It’s not clear exactly how many witnesses, now survivors, were in the store, though video footage showed at least a dozen being escorted out.They now join the thousands of people that have survived shootings at schools and other public places in the Denver metro since Columbine. More than 1,800 students attended Columbine in 1999, plus staff. Thousands more, collectively, were at other such shootings, like Platte Canyon High School in 2006, Deer Creek Middle School in 2010, a movie theater in Aurora in 2012, a Walmart in Thornton in 2017, and STEM School in Highlands Ranch in 2019.