NASHVILLE, Tennessee (AP) – Glen Campbell’s touring days are over. But that doesn’t mean it’s the end of the road for the country legend. He spent his 77th birthday in Washington D.C. as an advocate for research into Alzheimer’s disease – the illness that has progressed so far, it has stopped him from doing concerts. While in Washington D.C., Campbell stopped at Capitol Hill for a visit with lawmakers. His wife Kim says Campbell still occasionally does vocal tracks, remains healthy and can still jam on the guitar with other musicians.