Crews on Friday began tearing down the three-story classroom building where 17 people died in the 2018 mass shooting at Parkland's Marjory Stoneman Douglas High School. The victims' families have been invited to watch the first blows and hammer off a piece themselves if they choose. Officials plan to complete the weekslong project before the school’s 3,300 students return in August from summer vacation. Most were in elementary school when the shooting happened. MORE: https://www.wtsp.com/article/news/regional/florida/parkland-school-building-demolition-marjory-stoneman-douglas-high-school/67-fdd659cd-8067-4ea1-bd15-5bdb4c0f14b9