Which is more likely, Osama died on May1 2011 or that Lee Harvey Oswald acted alone?

That Osama died its been proven there is no possible way Lee Harvey Oswald could have pulled off the shots he supposedly did in the time frame he supposedly did it in with the rifle he was supposedly using. He was the lowest ranked marksman possible And someone of the highest rank could not pull the shots off from the same height and Angle on a stationary target let alone pull them off in the supposed time frame so how could the lowest rank pull them off of a moving target? And ranks of marksmanship are awarded by skill level