1.  And the chemicals and their explosive components have been slowly corroding their metal casings.

2.  And with the same relentlessness of the march of days and months and years, the chemicals and their explosive components have been slowly corroding their metal casings.

3.  He is being held in a Montana jail on federal charges of possessing explosive components.

4.  That idea, the most explosive component of the package, is being drafted and Katz said she plans to present it soon.