tragedies, the astro world concert in houston, the condo building in surfside, florida. >> it just felt like an earthquake. who ever thinks a building is going to collapse on you. >> without notice, the 12-story tower partially collapsed, killing more than 100 people as people slept. tragedy struck in new mexico while alec bald within was handed a gun, firing a real round, killing a cinematographer. ♪♪ some of last year's biggest stories led to this year's biggest trials. >> we, the jury, in the above-entitled matter as to count 1, unintentional murder by committing a felony find the defendant guilty. >> a jury found former minneapolis police officer chauvin guilty. in georgia three white men were