Plumes of smoke rise across the Damascus skyline.<br/> <br />The latest in several days of fierce aerial bombardment on this area of the Syrian capital, according to activists and rights groups and this video that Reuters can't independently verify.<br/> <br />The activists say the rebel stronghold of Jobar -- in the eastern outskirts of the city -- has been pounded by airstrikes, nearly 30 yesterday alone.<br/> <br />The government of President Bashar al Assad is trying to retake Jobar after it captured several rebel-held areas around the city center earlier this summer.<br/> <br />Other amateur video claims to show a rebel tank moving through Jobar the day before.<br/> <br />The rebels say this water tank was used by government forces as a sniper position.<br/> <br />In their three-year-long struggle to topple Assad, rebels haven't been able to take central Damascus<br/> <br />But the government is worried they'll reach the center of the capital by digging tunnels, from outlying suburbs that are under their control, j
