A forensic analyst is examining a 9-1-1 bomb threat that resulted in the cancelling of 21 ferry sailings from the Tsawwassen terminal this weekend, Delta Police said yesterday. There are no plans, however, at this time to release the recording of the call to the public, said Const. Sharlene Brooks, spokeswoman for Delta Police. “That’s not to say that it won’t (be released),” Brooks said. Thousands of passengers were stranded for as long as five hours Saturday as police and bomb-sniffing dogs searched everywhere.