What are the pros and cons of single sign on?

Is Pakistan army powerful army in the world? Do Spaniards like Americans? Why did Russia take over Siberia? How far is South Carolina from Iraq? What 2 countries are west of Vietnam? What is the postage rate for a letter from the USA to England? What is occupation of Sri Lanka? How did the angkor wat get lost? Where does the Tigris River start and end? Do they celebrate Valentine's Day in Costa Rica? What treaty did the british government formally recognized the thirteen colonies as free and independent? What time does it get light Orlando in November? What is the phone number of the North St. Paul Library in North St. Paul? What are four plants and animal raised on farms in Florida? What is the average weight loss from using acxion fentermina from Mexico? Where is the Michael C. Carlos Museum in Atlanta Georgia located? Where does Ethiopia fit in the globalization? A large venomous brightly-coloured lizard inhabiting deserts of the southwestern US and Mexico? Are there boarding schools in Malta? How do you currently make electricity in Arizona?