1.   Monday, Cliver said his testing included using fiber-optic sensors to register the heat inside the boards.

2.   My tactile sensors register the sharpness of the edge.

3.   My visual sensors register black and shiny.

4.   The sensors can register as little as a nanogram, or one billionth of a gram.

5.   Another sensor registers whether a front seat belt is buckled.

6.   The Helsinki University Institute of Seismology in nearby Finland also said Friday that their sensors registered two explosions last Saturday.