Text: this excursion sails at 6 a.m. and comes back to harbor at about 14:00 after lunch.

Correct capitalization: This excursion sails at 6 a.m. and comes back to harbor at about 14:00 after lunch.

Text: the most important part is motivated people who make things happen.

Correct capitalization: The most important part is motivated people who make things happen.

Text: browse 005b files in alphabetical order:

Correct capitalization: Browse 005B Files in Alphabetical Order:

Text: an eu-us summit is held in washington dc, at which the 'open skies' agreement on transatlantic air transport is signed, participants also agree to develop closer economic relations during the next few years.

Correct capitalization:
An EU-US summit is held in Washington DC, at which the 'Open Skies' agreement on transatlantic air transport is signed, participants also agree to develop closer economic relations during the next few years.