Were State Department security officials concerned that Damascus had once ordered Feltman's assassination?

In the WaPo, here

"...Feltman brings an unusual history to the diplomatic mission. As ambassador to Lebanon during the 2005 Cedar Revolution, his efforts to foster a government independent of Syrian influence so angered the Syrian government that at one point, State Department security officials were concerned that Damascus had ordered his assassination. Shortly before he returned to Washington, in January 2008, an embassy convoy was attacked in a car bombing that killed three Lebanese civilians and injured dozens of people; Feltman was traveling in another convoy and was not injured.

In Damascus, Clinton's announcement was greeted as tangible evidence that Syrian-U.S. relations will improve..."