'We don't seem to learn': Beirut explosion echoes US tragedy

The staggering videos from the Lebanese capital are grimly familiar to Tommy Muska thousands of miles away in Texas: a towering blast, a thundering explosion and shock waves demolishing buildings with horrifying speed.It is what the mayor of West, Texas, lived seven years ago when one of the deadliest fertilizer plant explosions in U.S. history partly leveled his rural town.On Wednesday, Muska also couldn't shake a familiar feeling — that yet again, no lessons will be learned.