Thousands of containers packed with essential food items, raw materials and medical equipment have been held up at Pakistan's Karachi port, as the country grapples with a desperate foreign exchange crisis. Pakistan's economy has crumbled alongside a simmering political crisis, with the rupee plummeting and inflation at decades-high levels, while devastating floods and a major shortage of energy have piled on further pressure. IMAGES show people at market in Karachi, people lining up for subsidised flour, importers protesting and medical supply shop IMAGES AND SOUNDBITES