Amid the chaos of the intensifying conflict in Sudan, 40-year-old Pakistani marketing executive Rana Usman faced an urgent dilemma. As the battle enters its 11th day, more than 700 Pakistanis have so far managed to reach Port Sudan, including approximately 200 who arrived there on Tuesday, according to Pakistan’s foreign ministry. Muhammed Ahsan Sami, a 39-year-old Pakistani chemical engineer living …