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Following are faculty and staff sources at the University of Colorado at Boulder who can comment on today's shooting at Virginia Tech in Blacksburg, Va.

Conference on World Affairs participant and presidential candidate Sen. Joseph Biden of Delaware spoke Friday at the University of Colorado at Boulder on the topic "America's Interest, Iraq's Future." Sen. Biden's talk from 1 p.m. to 2 p.m. today in Macky Auditorium on the CU-Boulder campus focused on his plan to withdraw American troops from Iraq and to help stabilize the Iraqi government.

Fiske Planetarium and Sommers-Bausch Observatory will celebrate National Astronomy Day on the University of Colorado at Boulder campus on Saturday, April 21, with an array of family-oriented activities from noon to 10 p.m. The event, which is free and open to the public, will include demonstrations of the new Science on a Sphere exhibit at Fiske Planetarium and numerous educational activities focused on astronomy in the planetarium and observatory. The observatory's telescopes also will be available for public use after 8 p.m., weather permitting.

The Silicon Flatirons Telecommunications Program of the University of Colorado Law School has received more than $750,000 from private and non-profit donors to help establish a new clinic and to fund research. Pam Samuelson and Robert Glushko of Berkeley, Calif., have donated $500,000 to establish a Technology Policy Law Clinic. The donation follows a $250,000 gift from the Dale Hatfield Research and Scholars Program to create a fund to support technology policy research, regulatory education and stipends for students to pursue public interest work in technology policy.