The Saudi man accused of attempting to use a weapon of mass destruction said he would get "maximum satisfaction" and be "smiling" after carrying out a terror attack against Americans, according to a recording played in court Tuesday.

Prosecutors capped three days of testimony with the recording of Khalid Ali-M Aldawsari, a 22-year-old former Texas Tech student who faces up to life in prison if convicted.

Aldawsari's defense attorneys presented no evidence or witnesses before resting their case. They contend their client never took the "substantial step" necessary for the court to find him guilty and that he never made a bomb.

Aldawsari is charged with attempted use of a weapon of mass destruction. Prosecutors have also accused him of having a list of potential targets, including former President George W. Bush's home in Dallas. Closing arguments are set for 9 a.m. Wednesday in federal court in Amarillo.