Investigators have always wondered if more people were involved in the bombings than just the brothers . Former CNN investigator : I think `` they had somebody who was more of a skilled bomb maker .. assist them '' There was no evidence the brothers ever tested their bombs before using them , Navy analyst says .
Investigators have always wondered if more people were involved in the bombings than just the brothers . Former Navy investigator : I think `` they had somebody who was more of a skilled bomb maker .. assist them '' There was no evidence the brothers ever tested their bombs before using them , CNN analyst says .