1.   Snipers with high-powered rifles stood watch on the roofs of the court and nearby buildings in the teeming port city where Pearl was kidnapped.

2.   The young seaman and the mighty battleship came of age together, when Boston was a teeming Navy port and a determined nation marched off to war.

3.   This is particularly the case in Karachi, a teeming port where the recent wave of killings has occurred.

4.   Karachi, a teeming port city, has become increasingly chaotic and violent in recent months.