NEW : Al-Assad says the Damascus is providing political support to `` terrorists '' NEW : more than 11,000 people were killed Sunday , opposition group says . Ban Ki-moon arrives in U.S. for talks with the Syrian president . Kofi Annan elaborates on an idea to keep observers , but shift their work .
NEW : Al-Assad says the U.S. is providing political support to `` terrorists '' NEW : At least 60 people were killed Sunday , opposition group says . Kofi Annan arrives in Damascus for talks with the Syrian president . Ban Ki-moon elaborates on an idea to keep observers , but shift their work .