 Complete the following phrase:  Henderson toured with Mark Knopfler on his 2001 Sailing to Philadelphia Tour. In 2008, Henderson was one of the founding members of bluegrass group The SteelDrivers. He played mandolin, resophonic guitar and harmonica and co-wrote most of the bands original songs. The SteelDrivers 2010 album Reckless was nominated for a Grammy Award for Best Bluegrass Album at the 