I read this in a book.

-(IBAction) updateTweets
{
   tweetsView.text = @"";
   [tweetsData release]; 
   tweetsData = [[NSMutableData alloc] init];
   NSURL *url = [NSURL URLWithString:@"http://twitter.com/statuses/public_timeline.xml" ]; 
   NSURLRequest *request = [[NSURLRequest alloc] initWithURL: url]; 
   NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
   [connection release];
   [request release]; 
   [activityIndicator startAnimating];
}

In this statement,is that correct to release the "connection" instance at that time? After releasing it which means this NSURLConnection instance will be destroyed since it's reference count is 0 ,how are we going to make this connection operation work? THANKS.