Chain Reaction, also known as The Strangeurs, was an American rock band from Yonkers, New York. They had two singles and were most notable for having lead singer Steven Tallarico (Steven Tyler, as he would later come to be known). They started off as the Strangers, until finding a group who already had that name, switching to The Strangeurs as a result. After a line-up change they changed their name to Chain Reaction. 　　Chain Reaction performed in concert as the opening act for such groups as The Beach Boys, The Byrds and The Yardbirds. The band's 1966 song "When I Needed You" appeared on Aerosmith's 1991 compilation box set album Pandora's Box.