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How can intelligence agencies improve detection?
Brian Katulis, Center for American Progress, and Michael Balboni, former director of New York homeland security, report on the progress of investigations in Brussels and share how intelligence gathering could improve.
Terror attack in Brussels
Mohamad Abrini charged with 'terrorist murders'02:34
Prosecutor: Mohamed Abrini is 3rd man at airport05:02
Belgian prosecutors confirm suspect05:17
Five new suspects arrested in Brussels02:59
Prosecutor confirms Brussels attack arrest02:23
New arrests in Brussels investigation01:29