- Forces are massing for an offensive to retake Raqqa, ISIS's headquarters in Syria
- Kurdish forces tell CNN there's been a big rise in the number of airstrikes nearby
- One commander says thousands of local tribesmen are prepared to join in the fight
Ayn al Issa near Raqqa, Syria (CNN)When Bahoz heard the blasts, he guessed they must have come from French jets. There were 14 of them, all around the time that President Francois Hollande said France had started bombing Raqqa.