The attacks of September 11, 2001 (9/11) caused thousands of deaths, national and global panic, and immediate action by the federal government to protect the borders of the United States of America (USA) from terrorism. In response to these attacks, the United States (U.S.) government enacted laws for law enforcement agencies to protect against terrorist activities. Law enforcement agencies are effective in combating terrorism, but their measures contain a major flaw - the improper use of race in profiling to address national security and public safety concerns. Racial profiling is an ineffective measure for preventing terrorism. There are solutions to correct this flaw through reconstructing training and implementing policies for all law enforcement agencies. The intent of this thesis is to discuss the history and the effectiveness of profiling in U.S. post-9/11 counterterrorism through theoretical research of peer-reviewed journals and articles, relevant laws, and United States Supreme Court cases to offer solutions to the problems racial profiling presents. The discussion will generate a search for new ways law enforcement agencies could conduct daily counterterrorism operations.