"Mossad has enjoyed an equally
inflated reputation, its history dotted with examples of comic ineptitude. When
I was correspondent in Jerusalem in the 1990s, a retired Mossad officer was
detained because it had finally been ascertained that Israel's main spy in
Syria, whom the officer claimed to control, did not exist. There had once been a
highly placed Syrian agent, but he had disappeared years earlier. Since this
event would have adversely affected the career of his Mossad controller in Tel
Aviv, he simply made up the agent's reports and claimed that the Syrian would
meet with nobody else but himself. Acting on the spy's information, the Israeli
army was once partially mobilised in expectation of a wholly fictitious Syrian
attack." (thanks Ali)