Israel has arguably the best-funded intelligence services in the Middle East and one of the best globally.
"We have no idea how this could have happened."
This was the first reaction that Israeli officials gave after the surprise attack by Hamas.
Despite all the vast resources of Israeli intelligence, the attack was not prevented.
Dozens of Palestinian gunmen were able to cross the fortified border between Israel and the Gaza Strip, while thousands of rockets were fired from Gaza into Israel.
The BBC calls it a failure of the Shin Bet, Israel's domestic intelligence, the Mossad, its external spy agency, and all the assets of the Israel Defense Forces.
Israel has arguably the best-funded intelligence services in the Middle East and one of the best globally.

Mossad has informants and agents inside Palestinian militant groups, in Lebanon, Syria and elsewhere.
In the past, Israel has carried out well-timed assassinations of militant leaders, knowing their every move intimately.
Sometimes these have been accomplished through drone strikes, as agents on the ground have placed trackers on adversary vehicles.
On the ground, along the fence between Gaza and Israel there are cameras, ground motion sensors and regular army patrols.
The barbed wire fence is supposed to have been an "impassable barrier" to prevent exactly the kind of infiltration that occurred in this attack.
However, it is suspected that Hamas militants punched holes in the wires or possibly entered Israel by sea.
To prepare and carry out such a coordinated, complex attack involving the collection and launch of thousands of rockets, right under the "noses" of the Israelis, must have been done under extraordinary security levels by Hamas.
It is not surprising that the Israeli media have asked urgent questions of their country's military and political leaders. how all this could have happened, on the 50th anniversary of another surprise attack, known as the Yom Kippur War, in October 1973.
Zyrtarët izraelitë thonë se një hetim i madh ka filluar, por megjithatë pikëpyetjet duket se do të vijojnë me vite.
Por tani Izraeli ka prioritete më urgjente. Ajo duhet të përmbajë dhe të shtypë depërtimin në kufijtë e saj jugorë, duke hequr ata militantë të Hamasit që kanë marrë kontrollin e disa komuniteteve në anën izraelite të gardhit kufitar.
Ajo do të duhet të trajtojë çështjen e qytetarëve të saj që janë kapur robër, qoftë përmes një misioni të armatosur shpëtimi ose përmes negociatave.
Rreth 24 orë pas nisjes së sulmit të befasishëm të Hamasit në Izrael, raportohet për 506 viktima nga të dyja palët.
Prime Minister Benjamin Netanyahu said Israel has entered a "long and difficult war" after the unprecedented attack by Hamas that left 250 dead. The Israeli military says dozens of Israelis, including women and children, are being held hostage in Gaza.
Israel warned Gaza of retaliatory attacks and asked citizens in Gaza to leave their homes and take refuge elsewhere. Meanwhile, officials say at least 256 people have died as a result of the attacks in Gaza.
Lini një Përgjigje