brookvillebandb: RT @timestravel: Why don’t planes fly at lower altitudes? That and more volcano questions answered in our ash Q&A: http://bit.ly/di5gC8

brookvillebandb: RT @timestravel: Why don’t planes fly at lower altitudes? That and more volcano questions answered in our ash Q&A: http://bit.ly/di5gC8 http://bit.ly/ahkJS6