For many countries, the events of the past weeks have been a loud wake-up call.

ECONOMIST: Cyberwarfare

Many other athletic events have been staged successfully in the wake of the Boston bombings, albeit with ramped-up security, including Sunday's Five Boro Bike Tour in New York City and last month's Penn Relays track and field competition in Philadelphia.

WSJ: Triathlon in New Mexico Canceled Due to Security Concerns