The article implies that passengers who opt out of the "raise your arms" millimeter wave scanner and go through the magnetometer instead will not have to take their shoes off unless the magnetometer alarms:
> Passengers who trigger the alarm at the scanners or magnetometers, however, will be required to take their shoes off for additional screening, according to the memo.
> Passengers who trigger the alarm at the scanners or magnetometers, however, will be required to take their shoes off for additional screening, according to the memo.