LAHORE - The students of Nazriati Summer School (NSS) organised by Nazria Pakistan Trust and Tehrike-e-Pakistan Workers Trust on Tuesday, visited Wahga border and science museum on 20th day of NSS. The students took keen interest in scientific instruments at science museum and here they were taught about chemistry, physics, biology and also about beginning and evolution of life. Later, at Wahga Border the students watched flag ceremony of the both countries where the teachers told the students about two-nation theory. They were also taught about the miseries and worries of the refugees and sacrifices of the muslims at the time of partition. On the occasion, the students sang national songs and chanted slogans of Pakistan Zinda Bad.