The attacks on our embassies & diplomats are a result of perceived American weakness. Mitt Romney is right to point that out.
Donald Rumsfeld was Secretary of War Defense between 2001 and 2006, so none of this should be news to him:
June 14, 2002, U.S. consulate in Karachi, Pakistan
Suicide bomber kills 12 and injures 51.
February 20, 2003, international diplomatic compound in Riyadh, Saudi Arabia
Truck bomb kills 17.
February 28, 2003, U.S. consulate in Karachi, Pakistan
Gunmen on motorcycles killed two consulate guards.
July 30, 2004, U.S. embassy in Taskkent, Uzbekistan
Suicide bomber kills two.
December 6, 2004, U.S. consulate in Jeddah, Saudi Arabia
Militants stormed and occupied perimeter wall. Five killed, 10 wounded.
March 2, 2006, U.S. consulate in Karachi, Pakistan
Suicide car bomber killed four, including a U.S. diplomate directly targeted by the assailants.
September 12, 2006, U.S. embassy in Damascus, Syria
Gunmen attacked embassy with grenades, automatic weapons, and a car bomb (though second truck bomb failed to detonate). One killed and 13 wounded.
January 12, 2007, U.S. embassy in Athens, Greece
A rocket-propelled grenade was fired at the embassy building. No one was injured.
July 9, 2008, U.S. consulate in Istanbul, Turkey
Armed men attacked consulate with pistols and shotguns. Three policemen killed.
March 18, 2008, U.S. embassy in Sana'a, Yemen
Mortar attack misses embassy, hits nearby girls' school instead.
September 17, 2008, U.S. embassy in Sana'a, Yemen
Militants dressed as policemen attacked the embassy with RPGs, rifles, grenades and car bombs. Six Yemeni soldiers and seven civilians were killed. Sixteen more were injured.
So did those attacks (and the 9/11 ones, for that matter) happen because of "perceived American weakness"? Is that what Rumsfeld wants to argue—that our country's diplomatic missions were targeted because George Bush's America was perceived as weak?
As for Obama, the attacks in Cairo and Benghazi are the first two attacks on a U.S. diplomatic mission in an ostensibly peaceful country during his entire presidency—and they were sparked by that idiot wingnut Islamophobe Terri Jones. The embassy in Afghanistan was targeted by the Taliban last Sept. 13, but that's a country at war.
If you buy Rumsfeld's nonsense, you can tally the numbers to determine which administration was "perceived weaker."