"Why Can't We Be Friends?" is a song by the band War. The song has a simple structure, with the phrase "Why can't we be friends?" being sung four times after each two-line verse amounting to over forty times in under four minutes. It was played in space when NASA beamed it to the linking of Soviet cosmonauts and U.S. astronauts in 1975 for the Apollo–Soyuz Test Project. "Why Can't We Be Friends?" charted at number six in 1975. The song is the main credits song for the film Lethal Weapon 4, and was also covered in Bridge to Terabithia and played during The Final Destination. American pop rock band Smash Mouth covered the song on their debut album Fush Yu Mang in 1997, releasing it as their second single.