Price of tougher security is worth paying

If attacks like the one in Boston come in bursts, it is conceivable that insurgents could follow with larger acts reports Leonid Bershidsky

Is the world overreacting to the act of terrorism at the Boston Marathon? Judging from the available research, what looks like a knee-jerk response might actually be quite sensible.

US authorities are not alone in stepping up security after the Boston attack, which left three people dead and more than 170 injured. British officials called for a review of the security measures planned for the London Marathon, the next major international event in the sport, on Sunday. In France, security patrols in public places have been reinforced.