The B&O Railroad Museum, 901 W. Pratt Street, Baltimore is hosting an event commemorating the 11th anniversary of the Roundhouse Roof Collapse from 10 a.m.-4 p.m. Feb. 16 and 11 a.m.-4 p.m. Feb. 17. They will host an exhibit "From Tragedy to Triumph" and will roll back admission prices that weekend. Tickets are $8 for adults, $7 for seniors and $5 for children between the ages of 2-12.