US media have said that Mr. Levinson was on an unauthorized CIA intelligence operation when he went missing on the Iranian island of Kish. From Washington, here is our correspondent Jonny Dymond.

美国媒体表示，列文森在伊朗基什岛失踪时在一家非官方的CIA情报机构工作。华盛顿，我们的通讯员Jonny Dymond报道。