American aviation pioneer Wally Funk, who was the oldest woman to go to space, has died at 87 in Texas.Ms Funk died Wednesday, local time, at her apartment in an assisted living facility in the Dallas-Fort Worth suburb of Grapevine, Texas, Grapevine City Councilwoman Duff O'Dell said.Ms O'Dell, who described herself as Ms Funk's caregiver, said she was by Ms Funk's side.Ms Funk had fallen a couple of times recently and had a leg infection."It took its toll," Ms O'Dell said in a phone interview.Ms O'Dell said Ms Funk was the "most eternally optimistic person" she had ever met."She was told by many, many, many men, 'No, you can't do this Godspeed, Wally."Ms Funk was also the first woman flight instructor at a US military base and the first woman to become an air safety investigator for the National Transportation Safety Board."I've done a lot of astronaut training through the world, Russia, America