dropping a table if it exists in sql server 2005

Hi,
    The following code  creates a table called New_Table in the database
and loads the result of the UNION into the new table.

SELECT  X.* INTO New_Table FROM

((SELECT  
 Netbios_name as Machine_Name,
Last_Login as User_Name
FROM  Table_A)

union

(select
CI_Name,
Used_by
from
Table_2)) as X


I now need to drop this table if it exists ,
my question is what syntax do i need to precede this with in order to drop the table New_Table?

Thanks