(Honolulu, HI)  --  Officials with the U.S. Coast Guard and Marine Corps say the search for 12 Marines missing after the collision of two helicopters off northern Oahu last Thursday has been suspended.  One of those Marines, Ty Hart, graduated in 2012 from Stayton High School in Marion County.  Coast Guard Captain Jim Jenkins says dive teams found wreckage of the two choppers on the ocean floor, but have found no survivors.  A memorial for the Marines is scheduled for Friday.