[Veto!]

The bullets Spiegelman's team used were from two of only four lots ever produced of the ammunition. The researchers were able to test for more elements than Guinn and used better quality control techniques, Spiegelman said.

Jumps right off the page at me. How large is a "lot"? Why were only four produced?

If I were a conspiracy theorist, which I don't have time for, I'd wonder who had the power to buy up an entire lot of bullets and have the manufacturer stop making them. Two, three, five, seven gunmen with identical bullets seems pretty well-organized to me.

[Deguello]

A "Lot" is a production run.

If anything is changed such as using a different bin or batch of propellant, projectiles, cases or primers to make the same exact type of end product then this will be a different Lot.

[Iwo Jima]

The CIA.