Editor's Note: This is the first in a seven-part series on personal security for international travelers.

Editor's Note: This is the fourth in a series of analyses on surveillance and countersurveillance.

Editor's Note:This is third in a series of analyses on surveillance and countersurveillance.

Editor's Note:This is the second in a series of analyses on surveillance and countersurveillance.

Editor's Note: This is the sixth in a series of reports on the terrorist attack cycle.

Editor's Note: This is the fifth in a series of reports on the terrorist attack cycle.

Editor's Note: This is the fourth in a series of reports on the terrorist attack cycle.

Editor's Note: This is the third in a series of reports on the terrorist attack cycle.

Editor's Note: This is the second in a series of reports on the terrorist attack cycle.

Terrorist attacks are the culmination of the six-stage attack cycle: target selection, planning, deployment, the attack, escape and exploitation.