The recent arrest of Pakistan's former prime minister, Imran Khan, has led to heightened political tensions, protests, and unrest in the country. While Khan has now been released, he faces more than 120 criminal charges. Protests by Khan's supporters and counter-demonstrations by government supporters are likely to continue, particularly in the capital Islamabad. International SOS's lead security analyst for Pakistan, Louise Hogan, has been telling us about the challenges facing Imran Khan and setting out what his arrest means for the country.