Gee, ya think? So when in the next century should we expect a response from the Obama administration? In three days, it will have been six months.

The attackers who killed U.S. Ambassador Chris Stevens and three other Americans last September in Benghazi, Libya, represented a variety of Islamist groups and were motivated by a myriad of factors, the top Libyan official investigating the case has told McClatchy Newspapers.

They almost certainly included members of al Qaeda in the Islamic Maghreb, the North Africa affiliate of al Qaeda, which the French now are confronting in northern Mali, Army Gen. Carter Ham, the head of the U.S. military’s Africa Command, said in a separate interview.

The two descriptions of what took place underscore the complexity of the threat posed by restive Islamist groups that suddenly found space to grow and expand after the collapse of the government of Libyan leader Moammar Gadhafi, whom Libyan rebels killed in October 2011 after a months-long NATO-led bombing campaign.