In May, the U.S. Justice Department's inspector general issued a report on the watch-list process, including a flow chart describing how anyone suspected of terrorist ties passes through a series of lists, the most serious of which includes the Transportation Security Administration's no-fly list.
In a statement, Greek government spokesman Dimitris Tsiodras condemned the assault, describing it as an attack on the country's democratic process, a view echoed by all Greek parties from across the political spectrum.