How does President Obama explain this one? Judge, Jury and Executioner?

President Obama, with the targeted drone program killing Americans,  has been judge, jury and executioner (with no review by anyone) for American citizens…

…but at the same time his Administration has argued that the 9-11 suspects should be brought to a NY Federal Court, granted the presumption of innocence and full constitutional rights (enjoyed by American citizens) — including a right to a lawyer, opportunity to present evidence and a jury to decide.  And if convicted?  Appeals to the US Court of Appeals and then the US Supreme Court.

How can the above two policies be reconciled?  Why do American citizens get summarily executed and foreign suspected terrorists get all the rights?