Arrange the following sentences in an order to make a meaningful paragraph:
1. After 17 hours, the hijackers opened fire and set off explosives.
2. Acting quickly, Neerja opened the emergency door and helped a number of passengers escape.
3. Neerja was the Senior Flight Purser on a Pan Am flight which was hijacked at Karachi airport.
4. She hid the passports of the Americans as the hijackers wanted to execute Americans.
5. Neerja laid down her life while saving hundreds of others.
6. Neerja comforted the passengers, especially the elderly and small children.