Undercover with Syrian army defectors
25 November 2011 Last updated at 10:40 GMT
The Free Syrian Army is made up of pro-democracy protesters and soldiers who have defected from the Syrian Army.
They are calling on the international community to impose a no-fly-zone and to create a safe area near Turkey.
The BBC's Paul Wood and cameraman Fred Scott were smuggled into Syria from Lebanon, and have spent a week undercover in Homs.
They are the first journalists to have spent time with the Free Syrian Army inside the country.