Lawmakers and safety advocates called for immediate security upgrades at Newark Liberty International Airport on Monday following a security breach that grounded flights for more than six hours. "This security breakdown was inexcusable, especially when our aviation system was supposedly on high alert," said Sen. Frank Lautenberg, D-N.J. Newark currently has no full-body scanners, though it is in line to receive one soon. Some experts, however, noted that "there are lots of [ways] to conceal powder and explosives," arguing that bomb-sniffing dogs would be both more efficient and less intrusive than full-body imaging.

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