Bob loves trains! The shining, spinning wheels... the sound of the whistle... the loud chug of the engine! When he visited the B&O Railroad Museum in Baltimore, MD, Bob learned how important trains were in our country's westward expansion (the growth of America's frontier towns).

This is what he learned:

• The "B&O" in B&O Railroad stands for "Baltimore and Ohio" because the train ran from Baltimore to the Ohio River.
• The B&O Roundhouse in Baltimore can hold 22 different locomotives which can be turned around with the help of a giant turntable.
• One of the largest steam locomotives in history -- the 1604 Allegheny -- can be seen at the B&O Railroad Museum.