Tanks shell Syrian city

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AMMAN, May 11 (Reuters): Army tanks shelled a residential district in Homs on Wednesday, said a rights campaigner in Syria's third city which has emerged as the most populous center of defiance against President Bashar al-Assad's rule. "Homs is shaking with the sound of explosions from tank shelling and heavy machineguns in the Bab Amro neighborhood," said Najati Tayara. Assad initially responded to the unrest, the most serious challenge to his 11-year grip on power, with promises of reform. He granted citizenship to stateless Kurds and last month lifted a 48-year state of emergency.