public international law

1. in 2011, US special forces killed the leader of al Qaida, Osama bin Laden, in Pakistan. Did the killing of bin Laden violate international humanitarian law?
2. How would you argue for the legality of turkey Humanitarian intervention/invasion in Northern Cyprus launched on 20th July 1974 under public international law, in the absence of an authorisation from the UN Security?

1. what are the conceptual differences between pre-emptory norms/ jus cogens and erga omnes obligations?
2. what are the conditions for lawful derogation from a human right convention?

what options does a forum state have in relation to criminal activities emanating from a foreign diplomatic mission located on its territory?