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APTOPIX Belgium Attacks(25 of29)
Open Image ModalPolice and rescue teams are pictured outside the metro station Maelbeek in Brussels, Tuesday, March 22, 2016. Explosions, at least one likely caused by a suicide bomber, rocked the Brussels airport and its subway system Tuesday, prompting a lockdown of the Belgian capital and heightened security across Europe. (AP Photo/Martin Meissner) (credit:ASSOCIATED PRESS)
Mideast Israel Belgium Airport Security(26 of29)
Open Image ModalAn 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 âa colossal failureâ of Belgian security, and he said âthe chances are very lowâ that such a bombing could take place in Israelâs 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) (credit:ASSOCIATED PRESS)
Mideast Israel Belgium Airport Security(27 of29)
Open Image ModalAn 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 âa colossal failureâ of Belgian security, and he said âthe chances are very lowâ that such a bombing could take place in Israelâs 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) (credit:ASSOCIATED PRESS)
Belgium Attacks NYC Security(28 of29)
Open Image ModalMetro-North Railroad police officers patrol Grand Central Terminal, in New York, Tuesday, March 22, 2016. Authorities are increasing security throughout New York City following explosions at the airport and subway system in the Belgian capital of Brussels. (AP Photo/Richard Drew) (credit:ASSOCIATED PRESS)
Belgium Attacks NYC Security(29 of29)
Open Image ModalMembers of the New York National Guard patrol Penn Station, Tuesday, March 22, 2016, in New York. Authorities are increasing security throughout New York City following explosions at the airport and subway system in Brussels. (AP Photo/Mark Lennihan) (credit:ASSOCIATED PRESS)