CAPE CANAVERAL, Fla. -- In the NASA News Center annex at NASA's Kennedy Space Center in Florida, social media participants listen to a briefing by NASA Administrator Charles Bolden. The social media participants gathered at the Florida spaceport for the launch of the Tracking and Data Relay Satellite, or TDRS-L spacecraft. Their visit included tours of key facilities and participating in presentations by key NASA leaders who updated the space agency's current efforts. Photo credit: NASA/Dan Casper