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print "Welcome, Mr. President." if from_whitehouse.gov();

instead of 

launch_nukes() if found_file("/bin/laden");

run_program() unless user_is_idiot();

open_file() or die;

print "Welcome, Mr. President"
{
...
#This can be bad. You have to read so many lines, get 
#confused, then go back and figure out where the block 
#began. Pain in the patukis.

if (expr)  {b()}