started falling from the ceiling , and then it was dark . '' Alexander said she went to check on her co-workers , and they headed for the nearest door . `` As we open the door , this ` poof ' sound comes in as if it were a flame or something behind it , '' she said . `` So we immediately shut the door and we smelled that smell , it was probably jet fuel . '' They closed the door and stood there , trying to figure out how to escape . `` The first thing that crossed my mind is I 'm not going to see my son anymore , '' Alexander said . A few blocks away , Robin DeHaven was driving his truck on his way to install windows when he spotted something strange in the sky . `` I looked on the horizon and I just saw a little dot and ... I 'm staring at it like , ` What is this ? It does n't look like a bird or anything . ' '' DeHaven said . `` And I realized it was a plane . '' Realizing there was
Austin , Texas -LRB- CNN -RRB- -- Lisa Alexander woke up early on February 18 , the same way she does every morning . `` My alarm usually goes off at 4:30 , 4:45 , '' she said . `` I lay in the bed and kind of plan out my day . '' She had no idea that her life was about to be targeted by a man with a vendetta against the government . She got up , woke up her son and headed to work at the IRS offices in Austin . `` The first thing I do is get in , organize my desk and wipe it down ... fire up my computer and tell everybody good morning , '' Alexander said . `` Before I know it , the building kind of went to the left and came back ... `` I thought it was an earthquake . '' It was n't . Just a few minutes before 10 a.m. , a single-engine Piper Cherokee PA-28 crashed into the multistory building where Alexander worked . `` It was like an explosion , '' she said . `` The windows started breaking out and the tiles