House members of the Congressional Asian Pacific American Caucus are pressing the country's top airline trade group for greater clarity on how it is working to mitigate racial and religious profiling by airlines.

In a letter to Airlines for America (A4A), which represents the nation's major carriers with the exception of Delta, lawmakers raised concern about a series of recent incidents in which perceived or actual Muslim and Arab-American passengers were reportedly suspected of terrorism and removed from planes without concrete evidence.

In one instance, a Muslim college student was pulled from a Southwest Airlines flight in California after making a telephone call in Arabic. In another, an Air Wisconsin flight was delayed when a professor's math equations were mistaken for terrorist code.

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