The jury returned a guilty verdict on three charges: conspiracy to kill Americans, conspiring to provide support to al-Qaeda, and providing support to al-Qaeda.

Why should there be a specific charge in the US for "conspiracy to kill Americans"?
Does that mean if someone plotted to blow up a plane in US air space that didn't have any American nationals on board, they wouldn't be comitting an offence?
Or would they be facing a different punishment?
And if either of the second/third are correct, is there any reason why a non-American National life would be considered to have a different 'value'?

(Or is there some logic behind it after all and I'm reading it too literally..?
