Well, a new study in the journal Cell says you can thank your amygdala for that. Because this key member of the brain’s fear circuitry can directly sense suffocation, and trigger feelings of terror.

根据《细胞》杂志所说，这种情绪的涌现都是扁桃体的错，因为这个大脑恐惧线路的关键的小东西可以感知窒息状态并触发恐惧情绪。

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All are alleged to be members of a 'terror cell' officials say is headed by former opposition leader Berhanu Nega.

VOA: standard.2009.05.25

Jeff Cohen,an ATF spokesperson. "One of our more noted success was a case a couple of years back involving a Hezbollah terror cell in North Carolina that was transporting cigarettes to the State of Michigan and making a great deal of money on the untaxed cigarettes and then was using the money to basically buy military equipment."

VOA: standard.2010.08.11

Last month the FBI arrested a terror cell planning to attack Fort Dix.

CENTERFORSECURITYPOLICY: Echoes of 1919

The United Arab Emirates says it has arrested members of what it called a terror cell which was planning attacks.

BBC: Map showing UAE and Saudi Arabia

According to the Sunday Telegraph, documents sent by MI6 to Libyan intelligence chief Moussa Koussa reveal a double agent was recruited to infiltrate an al-Qaeda terror cell.

BBC: Gaddafi