Greece asked NATO on Friday to help safeguard the Olympics after the deadly train bombings in Madrid heightened worldwide concern about safety at major sports events. Bomb squads and dogs joined expanded patrols at train stations across Greece as part of boosted security measures leading to the Aug. 13-29 games. Greece’s request to NATO came a day after Spain’s worst terrorist attack. Ten bombs blew up four trains during morning rush hour and killed nearly 200 people. Spain blamed Basque separatists, but a group claimed responsibility in the name of al-Qaida. NATO was asked to provide aerial and sea surveillance against a “chemical, biological and nuclear incident.” Athens’ massive security preparations already cost a record $800 million and involve 50,000 police and troops. Full Story