Lahore:Leader of Pakistan Muslim League-N Senator Pervaiz Rashid has said that coward are those people who keep silent by reconciling with target killers and extortionists and also compromise with them over the killing of 52 martyrs of 12 May incident for a public meeting in Karachi. Senator Pervaiz Rashid said that the people of Punjab will never forget the criminal silence of tsunami Khan over the crises of severe load-shedding and dengue virus.