Why Osama was buried at sea?
.::Things happened man, seriously::.
Ok, it just a joke.. but hey, its a good one.
Now take your head out of you ass and remember this:
Osama is a criminal and he is no way whatsoever, considered leader or even warrior of the Moslem. You know who is such a person? Omar Mokhtar and Sallehuddin, these kind of people that if they wage war, they won't kill civilians and definitely no suicide bombing.
Suicide is strictly forbidden in Islam because it is an affront to the God.