The ongoing drought in the West means more water is being drawn from underground, some say at an alarming rate.
Listen to Tuesday's congressional hearing on immigration
The U.S. Senate Subcommittee on Immigration, Refugees and Border Security held a hearing Tuesday on state governments enforcing immigration law. Witnesses at the hearing included Arizona State Senator Steve Gallardo; former U.S. Senator Dennis DeConcini; Todd Landfried representing Arizona Employers for Immigration Reform; and former Arizona State Senate President Russell Pearce, who sponsored Arizona's SB 1070.
Listen to the hearing, which was recorded from C-SPAN.