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Its said to have contained a 'granular type of powder concealed' in wax paper and plastic wrap, a criminal complaint stated.
'This granular type of powder is consistent with a commercial grade firework,' the complaint said.
There were also two fuses attached, one of which appeared to be part of the original manufacturing and is used to ignite explosives quickly.?
The other fuse was added later, and burns slower than a quick fuse, officials said adding that the powders could ignite from heat and friction posing a 'significant risk' to the plane and passengers.
Investigators also found in the suitcase a can of butane, a lighter, a pipe with white powder residue, a wireless drill and two GFCI outlets taped together.?