Can you share?
The court dismissed, I haven't read that they found the administration's actions themselves legal.
ACLU:
In May, the Obama administration publicly acknowledged responsibility for the killings, but the Justice Department continued to argue in court that national security concerns bar any judicial review of the government’s actions. In response to this broad claim, Judge Rosemary M. Collyer stated at oral argument that “the executive is not an effective check on the executive,” and in her opinion, she rejected the government’s argument that the case presented a “political question” that prevented the judiciary from hearing it at all. Nonetheless, she dismissed the case.
My question is, what is the check on the administration declaring whomever they want to be a target and killing them 'legally'?