Foreign Minister Bilawal Bhutto Zardari on Friday said Pakistan is facing the biggest disaster in history but the former prime minister and Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan is holding concerts in Khyber Pakhtunkhwa and Punjab. Taking to Twitter, he said, “Pakistan is facing the biggest disaster in our history. 1/3 of our country is underwater! 1/7 citizens affected, 35 million ppl! ex PM is holding concerts in KP & Punjab.CMs busy organizing his events instead of helping flood victims. Shameful, pehaly insan bano, phir siyasatdan bano!”