Tugboat, or Tug, a boat with a powerful engine used to tow or push ships and barges. Tugboats are usually small and are used mainly in harbors, rivers, and canals. They are generally about 100 feet (30 m) long and about 25 feet (8 m) wide. Most tugs use diesel or diesel-electric engines of up to about 2,000 horsepower. Larger, oceangoing tugs, up to about 300 feet (90 m) long, are used to aid disabled ships.
The Mikoyan-Guryevich MiG-15 was a surprise when it appeared in combat during the Korean War. Read the details of the MiG-15 and learn how it shook the United States aviation industry out of its somewhat complacent state following World War II.
Believe it or not, a number of countries around the world have either disarmed their militaries or never formed one in the first place. Test your knowledge of the world's nonmilitary powers.