Ozzie D, NP-hard :bikepump: :vegan:<p>Entrance to <a href="https://infosec.exchange/tags/HarvardSquare" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HarvardSquare</span></a> station, taken in the mid-1950s. Credits here: <a href="https://dome.mit.edu/handle/1721.3/35395" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dome.mit.edu/handle/1721.3/353</span><span class="invisible">95</span></a></p><p>Are those two uniformed guys police officers or MTA employees?</p><p><a href="https://infosec.exchange/tags/CambridgeMA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CambridgeMA</span></a> <a href="https://infosec.exchange/tags/CambridgeHistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CambridgeHistory</span></a> <a href="https://infosec.exchange/tags/MassachussetsHistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MassachussetsHistory</span></a> <a href="https://infosec.exchange/tags/MBTA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MBTA</span></a> <a href="https://infosec.exchange/tags/BWphotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BWphotography</span></a> <a href="https://infosec.exchange/tags/StreetPhotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StreetPhotography</span></a></p>