Nagarhar province in Afghanistan's east bordering Pakistan is 7,700 square kilometers in area, of the 652,000 square kilometers that Afghanistan spans. In terms of population though, it ranks third among the 34 provinces. Nangarhar has just over 1.5 million residents out of the total of 32 million population of the country. The capital of the province is Jalalabad. The Kabul river that passes through Kabul then flows through Jalalabad before entering Pakistan. One of the main tributaries of the Kabul river is the Kunar river. The Kabul is joined by the Kunar near Jalalabad.