"U.S. and Western weapons have been reaching Iranian-backed Shiite militias fighting to keep Bashar Assad's forces in power in Syria.

Analysts say it's unclear if the weapons were captured, stolen or bought on the black market in Syria, Turkey, Iraq or Libya. Propaganda photographs from Shiite militias posted on dozens of websites and Facebook pages show the weapons were acquired in new condition, said Phillip Smyth, an analyst for, a site affiliated with the Washington Institute for Near East Policy.

Many of the weapons are things the militias "shouldn't really have their hands on," Smyth said. Iranians love to show "they have weapons and systems that are very close to the Americans."

The ability of Assad's allies to obtain U.S. weapons is one of many reasons the United States should not supply Syrian rebels with weapons, which President Obama said he would start to do last month, said Rep. Ileana Ros-Lehtinen, R-Fla., former chairwoman of the House Foreign Affairs Committee."

Who saw something like this coming?