It's difficult to determine if chemical weapons have been deployed, unless you can recover a munition that retains traces of agent, said Martin.

CNN: Israeli official: Syria using chemical weapons

You can see what Swanson has achieved every time there is a competition for a new airborne jammer or advanced sensor or precision munition or tactical network.

FORBES: Enigmatic Raytheon Thrives As Defense Rivals Falter

Another snag is defining what a cluster munition is.

ECONOMIST: Cluster weapons

Furthermore, anything modified for a munition is a munition.

ECONOMIST: Space technology

The most determined effort to develop a small, cheap guided weapon, though, is the Forward Firing Miniature Munition (F2M2, or Spike missile), from the Naval Air Weapons Station in China Lake, California.

ECONOMIST: Cheap smart weapons

Evidence we have seen suggests that Syrian government forces delivered the 122mm cluster munition rockets containing submunitions using a BM-21 Grad multi-barrel rocket launcher, a truck-mounted system capable of firing 40 rockets nearly simultaneously with a range of 4 to 40 kilometers (2.5 to 25 miles).

CNN: The gruesome toll of deadly cluster bombs in Syria