    Sentence 1: ° It 's probably not the  easiest time to come In and~take over  the shuttle program , but I look  forward to the Challenge , © Parsons  told reporters ot NASA Peadquartere    Sentence 2: ° It 's probably not the  easiest time to come in and~take over  the shuttle program , " Mr. Parsons said  at 2a news “conference at NASA  headquarters .