Some speculate that the Iranians have added new capabilities.
The military doesn't think so:
"I see no change in trends" on the part of the insurgent's targeting efforts, "and I see no capability gaps" on the part of U.S. forces, Gen. Richard Cody said in an interview en route to this air base north of Kabul, Afghanistan's capital.
Of course, though the general said that people are making too much of this, the trend he speaks of could mean one of increasing Iranian-supplied capabilities for the enemy.
If the general is right, over time we will look back and see this as a clump with no broader significance. I sure hope that is the case.