The user can move through the header navigation by hitting the tab key to access the different navgiation
options. To open a sub menu the user can hit the down arrow and tab into the sub menu. To exit the sub
menu the user can hit the esc key.
The user can open the search by tabbing to the search icon and hitting the down arrow key. To submit the
search query the user can hit the enter key. To exit search the user can hit the esc key.
