Prime Minister Narendra Modi has said development and modern infrastructure are the key points for progress, and BJP has focused on these lines. Addressing an election rally at Bambolim, Goa this evening, Mr. Modi said he has helped middle class by reducing tax burden. <br />'' <br />'' He said mining industry is the backbone of development of Goa and all efforts are on to solve its problems. <br />'' <br />'' Paying tributes to former Chief Minister Manohar Parrikar, Mr. Modi said his exemplary work has taken Goa to new heights. He criticized Congress for weakening the development process and added that defence sector was weakened during their rule.<br />''  <br />