Rep. Peter DeFazio (D-Ore.) has some advice for people driving this Memorial Day holiday: Check your rearview mirror early and often because the driver of that approaching 18-wheeler may have failed one or more drug tests. A study released this week by Congress' Government Accountability Office found widespread refusal by drivers and trucking companies to conduct mandatory drug testing, little or no monitoring to ensure that drivers who test positive for drug or alcohol abuse complete required counseling programs and few if any safeguards to prevent truckers from altering urine samples or substituting fake specimens for analysis.

Officials: Stay away from aphrodisiac

Health officials are warning New Yorkers to stay away from an illegal aphrodisiac made from toad venom after the product apparently killed a man. The city's poison control center issued the warning Friday after receiving a hospital report that a 35-year-old man who ingested the hard, brown substance died earlier this month. The product is sold under names including Piedra, Love Stone, Jamaican Stone, Black Stone and Chinese Rock. It is banned by the Food and Drug Administration and has been seized from suspected drug traffickers along the East Coast.

What can a penny buy? Some parking

There's at least one city left in the U.S. where you just have to feed a penny into the parking meters. Meters in the north-central Illinois city of Sycamore cost a penny for 12 minutes, a nickel for one hour and a dime for two hours, police Chief Don Thomas said. And if you have a quarter you can buy 12 hours of parking. The fine for unpaid meters is a dollar.

3 charged in deaths of 2 Ph.D. students

Louisiana authorities identified three men arrested in the slayings of two LSU doctoral students as Michael Lewis, 19, Casey Gathers, 20, and Devin Parker, 19. Each faces two charges of first-degree murder in the December shooting deaths of Ph.D. students Chandrasekhar Reddy Komma and Kiran Kumar Allam from India in a campus apartment complex. Police refused to explain what led them to the suspects five months after the slayings, saying only that each has a criminal history in Baton Rouge.

Crews search for gas leaks in homes

Natural gas leaks and the threat of explosions kept hundreds of anxious residents from assessing the damage to their homes Friday, a day after a large tornado tore through a 35-mile stretch of northern Colorado, killing one person and injuring dozens. Police and National Guard troops cordoned off a particularly hard-hit area so utility crews could check each home for gas leaks, repair gas mains severed by uprooted trees, remove downed power lines and clear streets of shattered glass and debris.