On March 20:

1999 - Bertrand Piccard of Switzerland and Brian Jones of Britain became the first aviators to fly a hot-air balloon around the world nonstop.

March 22, 1980

Pink Floyd's single "Another Brick in the Wall," from the album of the same title, hits No. 1 on the U.S. Billboard pop charts.
The song was the band's only No. 1 single in the United States.
The band set records with its 1973 breakthrough album Dark Side of the Moon,
which stayed on Billboard's Top 200 Albums chart for 741 weeks, longer than any other album in history.

On March 25:

1634 - Maryland was founded by English colonists sent by Lord Baltimore; they arrived at St. Clement's Island and called the settlement St. Mary's.

Maryland is a state located in the Mid Atlantic region of the United States. It is comparable in size to the European country of Belgium. According to the most recent information provided by the U.S. Census Bureau, as of August 2007, Maryland is now the wealthiest state in the United States, with a median household income of US$65,144, ahead of New Jersey which had previously held that title.

It was the seventh state to ratify the United States Constitution and bears two nicknames, the Old Line State and the Free State. Its history as a border state has led it to exhibit characteristics of both the Northern and Southern regions of the United States. As a general rule, the rural areas of Maryland, such as Western, Southern, and Maryland's Eastern Shore, are more Southern in culture, while densely-populated Central Maryland — areas in the Baltimore and the Washington Beltway Regions — exhibit more Northern characteristics.

Maryland is a life sciences hub with over 350 biotechnology firms, making it the third-largest such cluster in the nation. Institutions and agencies located throughout Maryland include University System of Maryland, Johns Hopkins University, Howard Hughes Medical Institute, Celera Genomics, Human Genome Sciences (HGS), The Institute for Genomic Research (TIGR), the Food and Drug Administration (FDA), the National Institutes of Health (NIH) and the National Institute of Standards and Technology (NIST).

March 25, 1879

Little Wolf, often called "the greatest of the fighting Cheyenne," surrenders to his friend Lieutenant W. P. Clark.

Little Wolf was the chief of the Bowstring Soldiers, an elite Cheyenne military society.
From early youth, Little Wolf had demonstrated rare bravery and a brilliant understanding of battle tactics.
First in conflicts with other Indians like the Kiowa and then in disputes with the U.S. Army,
Little Wolf led or assisted in dozens of important Cheyenne victories.

On March 26:

1953 - Jonas Salk announces his polio vaccine.