Utilitarians, Libertarians, and Abdurahman Al Awlaki

In three substantive paragraphs, 

1) How would both libertarians and utilitarians judge the death of Abdurahman (Anwar al-Awlaki's son)? Why?

2) Which, if any, of these two perspectives do you find most persuasive and why?

Reference Sandel's lectures:

http://www.youtube.com/watch?v=0O2Rq4HJBxw

http://www.youtube.com/watch?v=Qw4l1w0rkjs