Massachusetts explosions: Gas blasts reveal danger of cast-iron pipes(02)

Massachusetts explosions: Gas blasts reveal danger of cast-iron pipes(02)

Video Screenshot Gallery: House Explodes Gas Leak

Gas Explosion Destroys House in Maryland, Killing Homeowner and Gas Employee - The New York Times
Possible gas leak suspected in explosion that destroyed house in Detroit - ABC News
Massachusetts explosions: Gas blasts reveal danger of cast-iron pipes