3 weeks ago , my spouse forgot her orkscrew and knitting needles were in her purse. They took them away. It was an International flight to Europe.
Yeah, corkscrews are on the forbidden list, but knitting needls are okay (by TSA rules, international carriers may impose different rules). The TSA list was last updated in November, 2003.
TSA Fact Sheet - Permitted and Prohibited Items <-- Link to 320 kB PDF file