ANKARA, Turkey (AP) -- Turkey, Italy, and Belgium arrested 53 militants in a coordinated crackdown Thursday on a Turkish Marxist group considered a terrorist organization by Washington, Turkey's Interior Ministry said. Police in Istanbul arrested 37 suspects of the Marxist Revolutionary People's Liberation Army-Front, or DHKP-C, while security forces Italy and Belgium detained 16, an Interior Ministry official said, speaking on condition of anonymity. Turkish and German police have been preparing for the crackdown for the past year, while the Italian police became involved more recently, the official said. German and Italian police discovered during their investigations that the group...