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  3. Securing Surface Transportation: Electromagnetic Wave Sensors

Securing Surface Transportation: Electromagnetic Wave Sensors

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    <video width="500" height="281" poster="https://www.dhs.gov/xlibrary/videos/17_0921_st_electromagnetic-wave-sensors.png" preload="metadata" data-able-player="data-able-player" playsinline="playsinline" controls="controls" > <source type="video/mp4" original content_type="video/mp4" url="https://www.dhs.gov/xlibrary/videos/17_0921_st_electromagnetic-wave-sensors.mp4" size="30462344" src="https://www.dhs.gov/xlibrary/videos/17_0921_st_electromagnetic-wave-sensors.mp4" /> <track type="normal" kind="captions" close_caption_url="https://media.dhs.gov/sites/default/files/assets/videos/captions/17_0921_st_electromagnetic-wave-sensors.en_.vtt" srclang="en" label="English" src="https://www.dhs.gov/medialibrary-assets/assets/videos/captions/17_0921_st_electromagnetic-wave-sensors.en_.vtt" /> </video> <p style="font:sans-serif; font-size:11px; font-style: italic;"><a href="/medialibrary/assets/videos/22795">View in Media Library</a> </p>
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What’s hiding behind the advertisements on the subway? A network of electromagnetic sensors that might save your life.  (DHS Video by Science & Technology Directorate/Released)