Video grab shows a Syrian tank driving through the city of Homs on December 26, 2011. Heavy gunfire killed 23 people in Syria’s besieged city of Homs today as newly arriving Arab League observers were urged to head immediately to one of the country’s most serious hot spots. Yesterday, the opposition Syrian National Council (SNC) said Homs was under siege and facing an “invasion” from some 4,000 troops deployed near the city that has become a focal point of the uprising against President Bashar al-Assad. AFP PHOTO (Photo credit should read -/AFP/Getty Images)
