[Avodah] tefillin at mincha

[Eli Turkel]

Yesterday on Tzom Gedalia at mincha I noticed several people in shul
wearing tefillin
(at least one Rav I had seen in the morning)

Why don't we wear tefillin at Mincha?
one should wear tefillin all day. We dont because we cant concentrate and
watch for cleanliness, so we do the minimum at Schacharit.
However, it would seem the same logic says we could concentrate for
the even shorter
mincha.

-- 
Eli Turkel