White House Principal Deputy Press Secretary Karine Jean-Pierre says that companies implementing vaccine requirements for their employees have the "flexibility to do that." At her briefing in Washington, Jean-Pierre also says that the federal government sees itself as a "model" to other companies ahead of remarks by US President Joe Biden where he announced that federal employees must prove vaccination or face rigorous testing and masking mandates. "That's something that we don't take lightly," she said. IMAGES AND SOUNDBITES