Our take: As more news is released about the death of Chris Stevens, U.S. State Ambassador to Libya, James Fallows of The Atlantic has made three points of what this killing really means:

"1) On the merits, this is outrageous and a tragedy. One of the first principles of diplomacy is that nations have a duty to protect the representatives of foreign states sent there to do international business. Today, American security forces have a duty to protect Libya's diplomats at their embassy in Washington DC and in consulates elsewhere. Yesterday, Libyan security forces had a duty, which they did not fulfill, to protect Ambassador Christopher Stevens and other U.S. representatives in Benghazi."