Not at a 100% level, but we know the Chinese government (and I suspect the UK government) are capable of deploying faked google.com SSL certs which'll pass unnoticed by just about anyone who's not using a certificate-pinning version of Chrome. And China(/Iran/Egypt) clearly has national-border level firewalls capable of using such faked SSL certs to MITM and deep packet inspect entire countries worth of internet traffic on the fly.