Urban beekeeping project works to restore honey bee populations with hives all over Washington, D.C.

From rooftops to government gardens, embassies to office buildings, if you know where to look, you'll find honey bees buzzing all over Washington, D.C.

The cityscape has become a hospitable home to the pollinators. About 15 years ago, honey bee populations hit an all-time low, so in 2014, former President Barack Obama launched a national strategy to protect and promote the insects. Bees and other pollinators are critical to the global food supply, pollinating about a third of the world's crops and three-fourths of all flowering plants. 

Soon after Obama's strategy was launched, hives were humming at government facilities across the country.