This might help,
"Lieberman's beard, a sign of Jewish mourning, draws media coverage
By Doug Chandler
Like the beard grown by his 2000 running mate, former Vice President Al Gore, U.S. Sen. Joseph I. Lieberman's new beard is drawing its share of media attention.
But the two gave up shaving for entirely different reasons.
Gore, the Democratic presidential candidate five years ago, grew his beard because he was no longer vying for office and could afford to relax.
Lieberman's beard is connected to the June 26 death of his mother, Marcia Lieberman, and the 30-day period of Jewish mourning known as shloshim, Hebrew for 30."