LAHORE JI Ameer Munawar Hasan has appealed to the nation to observe a countrywide protest on upcoming Friday against the killing of three nationals by Raymond Davis. In a statement issued here Wednesday, he said it was condemnable that the US was most obstinately and shamelessly pressurising Islamabad to release the killer. The US demand is not only an insult to the countrys judiciary, but also an attack on her sovereignty.