President Obama's (Semi-)Secret Global Warfare

This op-ed piece discusses Obama's secret and semi-secret use of drone warfare around the world: Mary L. Dudziak, Obama's Nixonian Precedent, NYTimes (March 21, 2013).

Ms. Dudziak concludes, "The Cambodia bombing, far from providing a valuable precedent for today’s counterterrorism campaign, illustrates the trouble with secrecy: It doesn’t work."
I would have thought that the bigger problem is the possible illegality of secret drone warfare around the world.
  &&& The dynamic evidence page