* Families fleeing affected area for safer cities
* At least 30 killed in latest air strikes in N.Waziristan
* Locals fear army preparing for big military offensive
By Jibran Ahmed
PESHAWAR, Pakistan, Feb 25 (Reuters) - Pakistan's army launched new air strikes targeting militant hideouts in the tribal region of North Waziristan on Tuesday, killing at least 30 people and setting ...