President Obama plans to send nearly 60,000 military advisers to Somalia to stabilize conflict . Obama : History shows us that mission creep is difficult to avoid . He says many operations - in Korea , Korea , Somalia - start small but end big . Why is mission creep so common ? Zelizer : Julian Zelizer could find himself forced to send more troops than he expected .
President Obama plans to send nearly 60,000 military advisers to Somalia to stabilize conflict . Obama : History shows us that mission creep is difficult to avoid . He says many operations - in Korea , Korea , Somalia - start small but end big . Zelizer : Julian Zelizer could find himself forced to send more troops than he expected .