February 21, 1967, Pink Floyd began recording their debut album, ‘Piper at the Gates of Dawn’. The Beatles were in the studio next door working on tracks for the Sgt. Pepper album. February 21, 1972, Led Zeppelin released ‘Rock And Roll / Four Sticks’ in the US, becoming a top 50 hit on the charts. February 21, 1975, David Bowie released the single “Young Americans”, which would go on to become a breakthrough hit in the US. February 21, 1986, Metallica released their third album, ‘Master of Puppets’.