先生のご指名にお答えしたいと思います。high school and college calculus - 田邉祐司ゼミ 常時英心：言葉の森から
A man dressed in a bulletproof vest and fire-resistant pants was arrested at Los Angeles International Airport after a smoke grenade, gas mask, leg irons and weapons were discovered in his luggage, federal authorities said Tuesday.
Boston-bound Yongda Huang Harris, 28, was arrested Friday on suspicion of transporting hazardous materials on a flight from Kansai International Airport in Osaka, U.S. Immigration and Customs Enforcement officials said.
Harris was not cooperating with federal officials attempting to interview him, according to a U.S. official who spoke on condition of anonymity to discuss an open investigation. The official said Harris is not believed to be linked to a terrorist organization, but his motive has not been determined.
Harris is a U.S. citizen whose permanent residence is in Boston, and he recently started living and working in Japan, officials said.
Harris has been charged with one count of transporting hazardous materials, an offense that carries a maximum penalty of five years in prison. Harris made a brief court appearance Tuesday, and his detention hearing was postponed to Friday.
Harris’ retained attorney, Steven Seiden, was unavailable to comment, said Chris Williams, a spokesman for the lawyer.
Seiden is unclear what Harris had on his body and what he had checked in baggage, which will be crucial information to the defense, said Williams, who declined to comment on why Harris was carrying any of the weapons.
“It raises a lot of questions, and those questions will need to be answered. Right now the case is very early,” Williams said.
The defense attorney’s spokesman described Harris as “very intelligent,” earning A’s in high school and college calculus. Williams declined to elaborate on his background.