The Rashtriya Swayamsevak Sangh is likely to invite Congress chief Rahul Gandhi and CPM general secretary Sitaram Yechury for a three-day lecture series by RSS chief Mohan Bhagwat. The RSS will organise three-day lecture series on the theme - ‘Future of Bharat: An RSS perspective’ at Vigyan Bhavan from September 17 to September 19. The idea behind event is to bring people of different ideologies together. During his recent visit to Germany and UK, Rahul Gandhi slammed RSS, the ideological mentor of BJP.