Is there as much drug abuse in the soldiers in Iraq as there was during the the Vietnam War?

My two deceased brother-in-laws, both Vietnam Vets, always told their stories about all the drugs they did while in Vietnam. Is that standard procedure in wars?

More Meth Drug Addiction Info:

• Bowel Pain After Drugs, Passing Stool Investigation | Healthhype.com
• list cancer drugs | Cancer Blog
• CHIP COFFEY Talks to Dead People |
• Drugs, Sex, and Holly Rollers « Broke-Ass Stuart's Goddamn Website
• Family Guy dishonors Vietnam Vets– The Right Scoop
• Hamlet Movie Review–Shakespeare For Today « Movies, Reviews and …
• Rememberance, fundraising at Greenacres' Vietnam vets gathering …
• Family Guy – Video | Vietnam Veterans Memorial | Obama Monument …
• Kuriousity | manga reviews and news » Blog Archive » Review: Oh …
• They fought for us; we forgot them | hi everybody