Families of the French citizens jailed in Iran hold a rally to urge their release, warning that their loved ones are enduring a sometimes years-long psychological and physical ordeal. "We hope to send messages of support. We hope they get wind of what's going on here and what we're doing for them," says Noemie Kohler, sister of Cecile Kohler, a teacher arrested in May with her partner Jacques Paris and accused of espionage. Seven French citizens are currently held by Iran, according to the French foreign ministry. They are among two dozen foreign nationals campaigners say Iran has jailed in a strategy of hostage-taking to extract concessions from the West. IMAGES AND SOUNDBITES