Schedule
13D
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CUSIP
No. 918284100
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Page 2 of 6
Pages
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1.
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Names
of Reporting Persons.
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Calvin S. Koonce | ||||
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I.R.S.
Identification Nos. of above persons (entities only).
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2.
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Check
the Appropriate Box if a Member of a Group (See
Instructions)
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(a)
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£
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(b)
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£
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3.
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SEC
Use Only
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4.
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Source
of Funds (See Instructions)
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PF
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5.
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Check
if Disclosure of Legal Proceedings Is Required Pursuant to Items
2(d) or
2(e)
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£ | ||
6.
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Citizenship
or Place of Organization
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United
States
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Number
of
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7.
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Sole
Voting Power: 833,909
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Shares
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Beneficially
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8.
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Shared
Voting Power: 0
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Owned
by
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Each
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9.
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Sole
Dispositive Power: 833,909
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Reporting
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Person With
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10.
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Shared
Dispositive Power: 0
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11.
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Aggregate
Amount Beneficially Owned by Each Reporting Person
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833,909
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12.
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Check
if the Aggregate Amount in Row (11) Excludes Certain
Shares (See Instructions) £
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13.
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Percent
of Class Represented by Amount in Row (11)
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16.5%
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14.
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Type
of Reporting Person (See Instructions)
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IN
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SCHEDULE
13D
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CUSIP
No. 918284100
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Page
3 of 6 Pages
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Item
1.
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Security
and Issuer
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Item
2.
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Identity
and Background
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Item
3.
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Source
and Amount of Funds or Other
Consideration
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Item
4.
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Purpose
of Transaction
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SCHEDULE
13D
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CUSIP
No. 918284100
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Page 4 of
6 Pages
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Item
5.
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Interest
in Securities of the
Issuer
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(c)
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Set
forth on Schedule A is a list of all the transactions in the Issuer's
Common Stock since the most recent filing on Schedule 13D by the
Reporting
Person. All such transactions were made in the open market
except as set forth on such
schedule.
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(d)
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No
Person other than the Reporting Person is known to have the right
to
receive or the power to direct the receipt of dividends from, or
the
proceeds from the sale of, such shares of Common Stock beneficially
owned
by the Reporting Persons.
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(e)
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Not
Applicable.
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Item
6.
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Contracts,
Arrangement, Understandings or Relationships with Respect to Securities
of
the Issuer
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Item
7.
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Materials
to be Filed as Exhibits
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SCHEDULE
13D
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CUSIP
No. 918284100
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Page 5 of
6 Pages
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Date:
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December
11, 2007
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/s/
Calvin S. Koonce
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Calvin
S. Koonce
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SCHEDULE
13D
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CUSIP
No. 918284100
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Page 6 of 6
Pages
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Date
of Transaction
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Number
of Shares of the Common Stock
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Buy/Sell/Other
Transaction
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Price
Per Share
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11/29/2007
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3000
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Sell
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51.626
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11/29/2007
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1656
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Sell
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51.8483
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11/30/2007
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2616
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Sell
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52.6867
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12/03/2007
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3691
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Sell
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51.8302
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12/03/2007
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3000
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Sell
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51.6952
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12/04/2007
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3809
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Sell
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52.1003
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12/05/2007
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5802
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Sell
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51.0645
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12/06/2007
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2352
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Sell
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50.5622
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12/07/2007
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2605
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Sell
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50.213
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12/07/2007
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2746
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Sell
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49.5547
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12/10/2007
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2395
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Sell
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51.1687
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12/10/2007
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12500
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Sell
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52.6608
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12/11/2007
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5081
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Sell
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53.3796
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