ISTANBUL (Reuters) -President Tayyip Erdogan said on Tuesday he expected concrete steps from allies in support of Turkey's counter-terrorism fight after a weekend bomb attack in Ankara, for which a Kurdish militant group claimed responsibility. Erdogan was speaking after Turkish police staged raids across the country on Tuesday, detaining tens of suspects over alleged links to the outlawed Kurdistan Workers Party (PKK). "We want to see concrete steps from friends in addition to messages of conde