It's been more than 10 years since American Robert Levinson went missing in Iran.
Now, his son is urging the Trump administration to do what it can to bring him home.
Dan Levinson tells CNN it will take a lot of work, and plenty of pressure, to get it done. "It's going to take negotiations. It's going to take a deal. President Trump has .. he's known as a deal maker. So I think it's going to take these negotiations. But it's going to take more than just asking for cooperation and help in locating him, which is what we've been hearing for 10 years. This more strongly-worded statement comes with the sticks that need to accompany the carrots when it comes to dealing with Iran. They only respond to pressure. We've learned this over 10 years. We're going to pressure our government to, in turn, pressure them as well."
Robert Levinson, who lived in Coral Springs, went missing in 2007 while traveling to Kish Island in Iran.
The former FBI agent had been hired as a CIA contractor the year before, but the White House says he was not a government employee when he disappeared.
Iran has long denied having anything to do with his disappearance.
In March, Levinson's wife and childrenfiled a federal lawsuit against Iran's government over his disappearance.
Information from WPTV contributed to this report.