An Israeli airport security guard patrols with a dog in Ben Gurion airport near Tel Aviv, Israel, Tuesday, March 22, 2016. After the Brussels attacks, Israel briefly announced that all Israeli flights from Europe were canceled, then reinstated the flights, Israel Airports Authority spokesman Ofer Leffler said. Pini Schiff, former director of security at Ben-Gurion Airport, said the attack in the Brussels airport was “a colossal failure” of Belgian security, and he said “the chances are very low” that such a bombing could take place in Israel’s airport. Israel's Ben-Gurion Airport is considered among the most secure in the world, an outcome stemming from several Palestinian attacks on Israeli planes and travelers in the 1970s. (AP Photo/Ariel Schalit)