As for motives like fear, preventative war is most attractive if the attacker believes he can win quickly and cheaply.

FORBES: Interstellar Aircraft Carriers and Science Fiction Naval Warfare

Prime Minister David Cameron Thursday praised Loyau-Kennett's performance in the tense situation and said she "spoke for all of us" when she told the first attacker that he could not win the war he said he was hoping to start on the streets of London.

NPR: Brave Woman Tried To Reason With London Attackers

Prime Minister David Cameron Thursday praised Ms. Loyau-Kennett's performance in the tense situation and said she "spoke for all of us" when she told the first attacker that he could not win the war he said he was hoping to start on the streets of London.

WSJ: Woman Tried to Reason With London Attackers