By Paul Cruickshank and Tim Lister
The suicide bombing in Ankara Friday is a reminder to counterterrorism agencies that it's not just jihadist groups who threaten Western governments and their interests overseas. Pockets of the extreme left and extreme right still consider political violence legitimate - among them the Revolutionary People's Liberation Party in Turkey.
Turkish authorities have blamed the U.S. Embassy attack on the group, better known as DHKP-C, and are in the process of identifying the bomber.
Analysts say it is likely the attack had two aims - to embarrass the Turkish government and to demonstrate the group's hostility to the deployment of Patriot anti-missile batteries on Turkish soil. Several members of the group are thought to be close to the Syrian regime.FULL STORY