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Rep. Marsha Blackburn said it's time to look at vulnerabilities in our legal immigration system following the revelation that the Bangladeshi man who allegedly detonated a pipe bomb in New York City on Monday entered the U.S. through chain migration.

Akayed Ullah, the 27-year-old attempted suicide bomber, was admitted to the U.S. in 2011 on a family immigrant visa.

"We have to clean this up," Blackburn (R-Tenn.) said on "America's Newsroom." "You have to look at the legal immigration policies and the effect that this has - the lottery system, the chain migration, those vulnerabilities that are seeded into the immigration system."

She said it's also important to look at individuals once they enter the U.S., and be aware of the associations and affiliations that they may have.

Ullah was one of 141,501 immigrants who have entered the U.S. from Bangladesh through chain migration since 2005, according to the White House.

He has been charged with criminal possession of a weapon, supporting an act of terrorism and making a terroristic threat, the New York Police Department announced Tuesday.

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