Which are examples of new security measures that were established after September 11, 2001? Check all that apply. A. People who cross the border into the United States must show passports.
B. People who take public transportation must be searched before boarding.
C. People who fly on airplanes must go through tougher screening measures.
D. People who travel abroad must pay a security fee to the government.
E. People who attend sporting events may face greater restrictions upon entry.