(CBS) The person responsible for analyzing the Iraqi weapons threat for Colin Powell says the Secretary of State misinformed Americans during his speech at the U.N. last winter. Greg Thielmann tells Correspondent Scott Pelley that at the time of Powell’s speech, Iraq didn’t pose an imminent threat to anyone – not even its own neighbors. “…I think my conclusion [about Powell’s speech] now is that it’s probably one of the low points in his long distinguished service to the nation,” says Thielmann. Pelley’s report will be broadcast on 60 Minutes II, Wednesday, Oct. 15 at 8 p.m. ET/PT. Thielmann also...