DENVER (AP) _ A geophysicist, a shipping clerk and two bus drivers were among 12 jurors selected Thursday to decide if Terry Nichols plotted to blow up the Oklahoma City federal building.

The seven women and five men were chosen after attorneys for both sides challenged 46 prospective jurors, primarily for their views on the death penalty, in 23 days of tedious, often personal questioning.

Opening statements were expected to begin Monday, after U.S District Judge Richard Matsch gives jurors the oath of office.

Prosecutors claim Nichols, 42, robbed a gun dealer to finance the plot and helped Timothy McVeigh build the bomb that exploded April 19, 1995, killing 168 people and injuring hundreds in the deadliest terrorist act ever on U.S. soil.

Prosecutors say the one-time Army buddies plotted the blast in retaliation for the federal government's deadly raid on the Branch Davidian compound near Waco, Texas, in 1993.

The defense has argued that Nichols is a committed family man who knew nothing of the plot and wasn't even in Oklahoma City the day of the blast.

Nichols could be sentenced to death if convicted of murder, conspiracy and weapons counts. McVeigh was condemned to death after his conviction on identical charges in June. His appeal is pending.