Sadhus and seers threatened to launch a countrywide agitation if 'Surya Namaskar' (sun salutation) is not included in the set of yogic postures to be performed on International Yoga Day slated for June 21. Terming Yoga a "boon" for the body, many BJP leaders said that the ancient Indian health practise should not be linked with any religion and those who oppose it are ignorant.