Video: 3 American Hiking Tourists Detained in Iran

From Denny: Three Americans were hiking in Turkey and crossed over the Iranian border inadvertantly. A fourth member of the party was too sick to hike and remained behind and so did not end up arrested in Iran.

This comes at a delicate time. The opposition party protestors are on trial in Iran. Holding these Americans can be a bargaining chip with the West, a real victory lap for the harsh regime and a way to shut up America about how the trial turns out. It will be interesting to see how this new subplot to the ongoing drama plays out.

Three Americans have been arrested after they strayed over the Iraqi border into Iran. CNN's Arwa Damon reports