Conversation so far:
Who created a lawsuit against the US?
al-Awlaki's father, Nasser al-Awlaki.
When did he open this lawsuit?
July 2010.
Why did he create the lawsuit?
to represent his son in a lawsuit that sought to remove Anwar from the targeted killing list.

Question: why did he want to remove him from the list?
Self-contained rewrite: Why did Anwar al-Awlaki's father want to remove him from the list?