LONDON PML-N Quaid Nawaz Sharif has stressed the need for developing harmony to overcome grave challenges faced by the country. During his meeting with member British House of Lords Lord Nazir Ahmed who had come to inquire after his health on Wednesday, he asked the nation not to get disappointed as he would soon return homeland and chalk out future line of action to pull the country out of crises. Nawaz said that they have to make tough decisions in the future. Lord Nazir said that Nawaz is only leader who has the ability to keep the nation united while on the contrary leaders of other political parties wanted to divide the country. Monitoring Desk adds: President Asif Zardari has contacted Nawaz Sharif and inquired after his health, reported Waqt TV channel on Wednesday. President Asif Zardari prayed for quick recovery of Nawaz Sharif who has undergone cardiac treatment in London. Nawaz thanked President Zardari for his concerns.