When was Twitter first launched?

More Questions:

What does the legal term "Persona non grata" mean?

Upon his death, what convicted killer donated his corneas?

What does a "caliber" measure?

What artistic technique requires painting watercolors directly onto wet plaster?

In the Bible, who is the mother of the prophet Samuel?

In what Puccini opera does Scarpia appear?

What 1920's novel by Hermann Hesse, gave it’s name to a 1960's rock group fronted by singer John Kay?

What musical parodist sang the Halloween song "Nature Trail to Hell"?

Who played Leon, Roseanne's boss at the café, on the sitcom "Roseanne"?

Which two teams automatically qualified for the 1998 soccer World Cup?

Whose series of thirteen children's books of thirteen chapters each ended in 2006 with "The End"?

Who Wrote Aretha Franklins "Respect"?

In what year was the "Star Spangled Banner" designated the US National Anthem?

Which amendment to the US Constitution deals with abolishing slavery?

What is the capital of Macedonia?