Hoover Dam transformer explodes; no one hurt
By Felícia Fonseca & Ken Ritter
Hoover Dam: Where does the power go?
By Duncan Phenix
Massive explosion rocks Hoover Dam with black smoke and fire seen inside turbine house
By Keith Griffith
Transformer explodes at Hoover Dam, prompting emergency response; fire quickly extinguished
By Felicia Alvarez
Hoover Dam explosion reported in tourist video
By Danielle Wallace