"He is known to be a merciless butcher," said Mohammed al-Tayeb, an opposition activist speaking by Skype from the rebel-held Damascus suburb of Douma, among the areas pounded by the 4th Division's assaults. Within President Bashar Assad's circle of trust, Maher Assad has advocated an uncompromising response throughout the uprising. "From the beginning, Maher was convinced that the uprising must be put down before any talks take place," said Fawaz A. Gerges, director of the Middle East Center at the London School of Economics. "The life of the regime depends on Maher's ability to prevent the rebels from infiltrating Damascus...