What's the Kennection? #247

In what sport have lead sinkers largely been replaced by more environmentally friendly ones made from bismuth or tungsten?

In his first State of the Union address, Lyndon Johnson declared an "unconditional war" on what "national problem"?

What group of actors that narrated Greek dramas did Aeschylus reduce from fifty men to twelve in his plays?

When Desi Arnaz performed his trademark song "Babalu" on I Love Lucy, what kind of drum did he play?

Which Thomas Pynchon novel imagines one of the title surveyors being abducted into the hollow Earth at the North Pole?

What's the "Kennection"?