White House on lockdown after individual drops backpack, attempts to jump bike rack
A CBS reporter on-site tweeted images of Secret Service personnel seeking shelter behind trees on the White House lawn
German airports on alert for fear of terrorist attacks
Details of the suspects taking photos of Stuttgart airport were passed to German police by Morocco's secret service, reports say
German Federal police evacuate part of a terminal at Frankfurt Airport following security alert
The alert sparked concern for some passengers and several social media users contacted the airport
